61646822716 has 6 divisors (see below), whose sum is σ = 107881939760. Its totient is φ = 30823411356.

The previous prime is 61646822707. The next prime is 61646822759. The reversal of 61646822716 is 61722864616.

It is a self number, because there is not a number n which added to its sum of digits gives 61646822716.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7705852836 + ... + 7705852843.

Almost surely, 2^61646822716 is an apocalyptic number.

It is an amenable number.

61646822716 is a deficient number, since it is larger than the sum of its proper divisors (46235117044).

61646822716 is a wasteful number, since it uses less digits than its factorization.

61646822716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15411705683 (or 15411705681 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The spelling of 61646822716 in words is "sixty-one billion, six hundred forty-six million, eight hundred twenty-two thousand, seven hundred sixteen".