61686754875 has 80 divisors (see below), whose sum is σ = 115150093344. Its totient is φ = 32857358400.

The previous prime is 61686754823. The next prime is 61686754901. The reversal of 61686754875 is 57845768616.

61686754875 is a `hidden beast` number, since 6 + 1 + 6 + 86 + 7 + 548 + 7 + 5 = 666.

It is not a de Polignac number, because 61686754875 - 2²⁷ = 61552537147 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 8876152 + ... + 8883098.

Almost surely, 2^61686754875 is an apocalyptic number.

61686754875 is a deficient number, since it is larger than the sum of its proper divisors (53463338469).

61686754875 is an equidigital number, since it uses as much as digits as its factorization.

61686754875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7851 (or 7832 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 63.

The spelling of 61686754875 in words is "sixty-one billion, six hundred eighty-six million, seven hundred fifty-four thousand, eight hundred seventy-five".