61564646516 has 24 divisors (see below), whose sum is σ = 107988678336. Its totient is φ = 30710796480.

The previous prime is 61564646513. The next prime is 61564646519.

61564646516 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (61564646513) and next prime (61564646519).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61564646513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5335145 + ... + 5346671.

It is an arithmetic number, because the mean of its divisors is an integer number (4499528264).

Almost surely, 2^61564646516 is an apocalyptic number.

It is an amenable number.

61564646516 is a deficient number, since it is larger than the sum of its proper divisors (46424031820).

61564646516 is a wasteful number, since it uses less digits than its factorization.

61564646516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14519 (or 14517 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 50.

The spelling of 61564646516 in words is "sixty-one billion, five hundred sixty-four million, six hundred forty-six thousand, five hundred sixteen".