61515560151 has 12 divisors (see below), whose sum is σ = 89041318080. Its totient is φ = 40924753920.

The previous prime is 61515560149. The next prime is 61515560207. The reversal of 61515560151 is 15106551516.

It is a happy number.

61515560151 is a `hidden beast` number, since 6 + 1 + 51 + 556 + 0 + 1 + 51 = 666.

It is not a de Polignac number, because 61515560151 - 2¹ = 61515560149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515560111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7130410 + ... + 7139031.

It is an arithmetic number, because the mean of its divisors is an integer number (7420109840).

Almost surely, 2^61515560151 is an apocalyptic number.

61515560151 is a deficient number, since it is larger than the sum of its proper divisors (27525757929).

61515560151 is a wasteful number, since it uses less digits than its factorization.

61515560151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14269926 (or 14269923 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 61515560151 in words is "sixty-one billion, five hundred fifteen million, five hundred sixty thousand, one hundred fifty-one".