1851449377536 has 576 divisors, whose sum is σ = 6195184128000. Its totient is φ = 540259614720.

The previous prime is 1851449377513. The next prime is 1851449377549. The reversal of 1851449377536 is 6357739441581.

1851449377536 is a `hidden beast` number, since 1 + 8 + 5 + 1 + 4 + 4 + 93 + 7 + 7 + 536 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-2 number, since 2×1851449377536² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1056159636 + ... + 1056161388.

It is an arithmetic number, because the mean of its divisors is an integer number (10755528000).

Almost surely, 2^{1851449377536} is an apocalyptic number.

1851449377536 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 1851449377536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3097592064000).

1851449377536 is an abundant number, since it is smaller than the sum of its proper divisors (4343734750464).

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

1851449377536 is a wasteful number, since it uses less digits than its factorization.

1851449377536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2297 (or 2277 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 63.

The spelling of 1851449377536 in words is "one trillion, eight hundred fifty-one billion, four hundred forty-nine million, three hundred seventy-seven thousand, five hundred thirty-six".