61664846616 has 64 divisors (see below), whose sum is σ = 174523183200. Its totient is φ = 20167115904.

The previous prime is 61664846587. The next prime is 61664846627.

61664846616 is a `hidden beast` number, since 6 + 16 + 6 + 4 + 8 + 4 + 6 + 616 = 666.

61664846616 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2681811 + ... + 2704706.

Almost surely, 2^61664846616 is an apocalyptic number.

It is an amenable number.

61664846616 is an abundant number, since it is smaller than the sum of its proper divisors (112858336584).

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

61664846616 is a wasteful number, since it uses less digits than its factorization.

61664846616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5386585 (or 5386575 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The spelling of 61664846616 in words is "sixty-one billion, six hundred sixty-four million, eight hundred forty-six thousand, six hundred sixteen".