151620927138 has 30 divisors (see below), whose sum is σ = 339754294209. Its totient is φ = 50538657024.

The previous prime is 151620927103. The next prime is 151620927149. The reversal of 151620927138 is 831729026151.

151620927138 is a `hidden beast` number, since 1 + 5 + 1 + 620 + 9 + 2 + 7 + 13 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 146671382529 + 4949544609 = 382977^2 + 70353^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=275337.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 151620927093 and 151620927102.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4940770 + ... + 4971362.

Almost surely, 2^151620927138 is an apocalyptic number.

151620927138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

151620927138 is an abundant number, since it is smaller than the sum of its proper divisors (188133367071).

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

151620927138 is an frugal number, since it uses more digits than its factorization.

151620927138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61200 (or 30598 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 151620927138 in words is "one hundred fifty-one billion, six hundred twenty million, nine hundred twenty-seven thousand, one hundred thirty-eight".