1861725537162 has 48 divisors (see below), whose sum is σ = 4038425371968. Its totient is φ = 619854586560.

The previous prime is 1861725537149. The next prime is 1861725537163. The reversal of 1861725537162 is 2617355271681.

1861725537162 is a `hidden beast` number, since 1 + 8 + 6 + 1 + 72 + 553 + 7 + 16 + 2 = 666.

It is a super-2 number, since 2×1861725537162² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1861725537099 and 1861725537108.

It is not an unprimeable number, because it can be changed into a prime (1861725537163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56244237 + ... + 56277327.

It is an arithmetic number, because the mean of its divisors is an integer number (84133861916).

Almost surely, 2^{1861725537162} is an apocalyptic number.

1861725537162 is an abundant number, since it is smaller than the sum of its proper divisors (2176699834806).

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

1861725537162 is a wasteful number, since it uses less digits than its factorization.

1861725537162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36635 (or 36632 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 54.

The spelling of 1861725537162 in words is "one trillion, eight hundred sixty-one billion, seven hundred twenty-five million, five hundred thirty-seven thousand, one hundred sixty-two".