61640116658883 has 72 divisors (see below), whose sum is σ = 109139703101520. Its totient is φ = 33333468779520.

The previous prime is 61640116658851. The next prime is 61640116658917. The reversal of 61640116658883 is 38885661104616.

61640116658883 is a `hidden beast` number, since 6 + 1 + 6 + 40 + 1 + 1 + 6 + 6 + 588 + 8 + 3 = 666.

It is a Cunningham number, because it is equal to 7851122²-1.

It is not a de Polignac number, because 61640116658883 - 2⁵ = 61640116658851 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 61640116658883.

It is not an unprimeable number, because it can be changed into a prime (61640116658833) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3925563 + ... + 11776683.

Almost surely, 2^{61640116658883} is an apocalyptic number.

61640116658883 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

61640116658883 is a deficient number, since it is larger than the sum of its proper divisors (47499586442637).

61640116658883 is a wasteful number, since it uses less digits than its factorization.

61640116658883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7852097 (or 7852087 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 61640116658883 in words is "sixty-one trillion, six hundred forty billion, one hundred sixteen million, six hundred fifty-eight thousand, eight hundred eighty-three".