161235512460 has 72 divisors (see below), whose sum is σ = 533542975056. Its totient is φ = 39087396480.

The previous prime is 161235512443. The next prime is 161235512467. The reversal of 161235512460 is 64215532161.

161235512460 is a `hidden beast` number, since 1 + 6 + 1 + 23 + 551 + 24 + 60 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161235512467) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40714059 + ... + 40718018.

It is an arithmetic number, because the mean of its divisors is an integer number (7410319098).

Almost surely, 2^161235512460 is an apocalyptic number.

161235512460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161235512460 is an abundant number, since it is smaller than the sum of its proper divisors (372307462596).

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

161235512460 is a wasteful number, since it uses less digits than its factorization.

161235512460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81432103 (or 81432098 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 161235512460 in words is "one hundred sixty-one billion, two hundred thirty-five million, five hundred twelve thousand, four hundred sixty".