161268359925904 has 135 divisors (see below), whose sum is σ = 399527299757523. Its totient is φ = 62830304644800.

The previous prime is 161268359925859. The next prime is 161268359925961. The reversal of 161268359925904 is 409529953862161.

It is a happy number.

The square root of 161268359925904 is 12699148.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3911316969 + ... + 3911358199.

Almost surely, 2^{161268359925904} is an apocalyptic number.

161268359925904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161268359925904 is the 12699148-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161268359925904

161268359925904 is an abundant number, since it is smaller than the sum of its proper divisors (238258939831619).

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

161268359925904 is an frugal number, since it uses more digits than its factorization.

161268359925904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82506 (or 41251 counting only the distinct ones).

The product of its (nonzero) digits is 251942400, while the sum is 70.

The spelling of 161268359925904 in words is "one hundred sixty-one trillion, two hundred sixty-eight billion, three hundred fifty-nine million, nine hundred twenty-five thousand, nine hundred four".