161862525612 has 48 divisors (see below), whose sum is σ = 444328506720. Its totient is φ = 50780399616.

The previous prime is 161862525611. The next prime is 161862525637. The reversal of 161862525612 is 216525268161.

161862525612 is a `hidden beast` number, since 1 + 6 + 1 + 8 + 6 + 2 + 5 + 25 + 612 = 666.

It is not an unprimeable number, because it can be changed into a prime (161862525611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44078373 + ... + 44082044.

It is an arithmetic number, because the mean of its divisors is an integer number (9256843890).

Almost surely, 2^161862525612 is an apocalyptic number.

161862525612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161862525612 is an abundant number, since it is smaller than the sum of its proper divisors (282465981108).

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

161862525612 is a wasteful number, since it uses less digits than its factorization.

161862525612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88160447 (or 88160439 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The spelling of 161862525612 in words is "one hundred sixty-one billion, eight hundred sixty-two million, five hundred twenty-five thousand, six hundred twelve".