151718819121 has 45 divisors (see below), whose sum is σ = 229263716539. Its totient is φ = 99989031744.

The previous prime is 151718819101. The next prime is 151718819149. The reversal of 151718819121 is 121918817151.

It is a happy number.

The square root of 151718819121 is 389511.

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

151718819121 is a `hidden beast` number, since 1 + 517 + 1 + 8 + 8 + 1 + 9 + 121 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2673407025 + 149045412096 = 51705^2 + 386064^2 .

It is not a de Polignac number, because 151718819121 - 2³³ = 143128884529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (151718819101) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 396132496 + ... + 396132878.

Almost surely, 2^151718819121 is an apocalyptic number.

151718819121 is the 389511-st square number.

151718819121 is the 194756-th centered octagonal number.

It is an amenable number.

151718819121 is a deficient number, since it is larger than the sum of its proper divisors (77544897418).

151718819121 is an frugal number, since it uses more digits than its factorization.

151718819121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004 (or 499 counting only the distinct ones).

The product of its digits is 40320, while the sum is 45.

The spelling of 151718819121 in words is "one hundred fifty-one billion, seven hundred eighteen million, eight hundred nineteen thousand, one hundred twenty-one".