61656340914 has 48 divisors (see below), whose sum is σ = 158327402688. Its totient is φ = 17616096432.

The previous prime is 61656340903. The next prime is 61656340919. The reversal of 61656340914 is 41904365616.

61656340914 is a `hidden beast` number, since 6 + 1 + 6 + 5 + 634 + 0 + 9 + 1 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61656340914.

It is not an unprimeable number, because it can be changed into a prime (61656340919) 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, 9058377 + ... + 9065180.

It is an arithmetic number, because the mean of its divisors is an integer number (3298487556).

Almost surely, 2^61656340914 is an apocalyptic number.

61656340914 is an abundant number, since it is smaller than the sum of its proper divisors (96671061774).

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

61656340914 is a wasteful number, since it uses less digits than its factorization.

61656340914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18123581 (or 18123569 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 61656340914 in words is "sixty-one billion, six hundred fifty-six million, three hundred forty thousand, nine hundred fourteen".