61755963867 has 48 divisors (see below), whose sum is σ = 99672195168. Its totient is φ = 37984826880.

The previous prime is 61755963859. The next prime is 61755963949. The reversal of 61755963867 is 76836955716.

61755963867 is a `hidden beast` number, since 6 + 1 + 7 + 5 + 596 + 38 + 6 + 7 = 666.

It is not a de Polignac number, because 61755963867 - 2³ = 61755963859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61755964867) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9034483 + ... + 9041315.

It is an arithmetic number, because the mean of its divisors is an integer number (2076504066).

Almost surely, 2^61755963867 is an apocalyptic number.

61755963867 is a deficient number, since it is larger than the sum of its proper divisors (37916231301).

61755963867 is a wasteful number, since it uses less digits than its factorization.

61755963867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9722 (or 9710 counting only the distinct ones).

The product of its digits is 57153600, while the sum is 63.

The spelling of 61755963867 in words is "sixty-one billion, seven hundred fifty-five million, nine hundred sixty-three thousand, eight hundred sixty-seven".