61564046516 has 24 divisors (see below), whose sum is σ = 125991539520. Its totient is φ = 25770995712.

The previous prime is 61564046497. The next prime is 61564046527.

61564046516 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25565261 + ... + 25567668.

It is an arithmetic number, because the mean of its divisors is an integer number (5249647480).

Almost surely, 2^61564046516 is an apocalyptic number.

It is an amenable number.

61564046516 is an abundant number, since it is smaller than the sum of its proper divisors (64427493004).

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

61564046516 is a wasteful number, since it uses less digits than its factorization.

61564046516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51132983 (or 51132981 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 61564046516 in words is "sixty-one billion, five hundred sixty-four million, forty-six thousand, five hundred sixteen".