1851151611136 has 72 divisors (see below), whose sum is σ = 3819924801000. Its totient is φ = 894715822080.

The previous prime is 1851151611121. The next prime is 1851151611137. The reversal of 1851151611136 is 6311161511581.

It can be written as a sum of positive squares in 4 ways, for example, as 33357369600 + 1817794241536 = 182640^2 + 1348256^2 .

It is a super-2 number, since 2×1851151611136² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1851151611137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335040 + ... + 1953088.

It is an arithmetic number, because the mean of its divisors is an integer number (53054511125).

Almost surely, 2^{1851151611136} is an apocalyptic number.

1851151611136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1851151611136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1909962400500).

1851151611136 is an abundant number, since it is smaller than the sum of its proper divisors (1968773189864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1851151611136 is a wasteful number, since it uses less digits than its factorization.

1851151611136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618215 (or 1618201 counting only the distinct ones).

The product of its digits is 21600, while the sum is 40.

The spelling of 1851151611136 in words is "one trillion, eight hundred fifty-one billion, one hundred fifty-one million, six hundred eleven thousand, one hundred thirty-six".