61564846516 has 12 divisors (see below), whose sum is σ = 107740261188. Its totient is φ = 30781914752.

The previous prime is 61564846513. The next prime is 61564846579.

61564846516 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 18111776400 + 43453070116 = 134580^2 + 208454^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61564846513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320070 + ... + 474946.

It is an arithmetic number, because the mean of its divisors is an integer number (8978355099).

Almost surely, 2^61564846516 is an apocalyptic number.

It is an amenable number.

61564846516 is a deficient number, since it is larger than the sum of its proper divisors (46175414672).

61564846516 is a wasteful number, since it uses less digits than its factorization.

61564846516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254258 (or 254256 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 52.

The spelling of 61564846516 in words is "sixty-one billion, five hundred sixty-four million, eight hundred forty-six thousand, five hundred sixteen".