61600992644 has 12 divisors (see below), whose sum is σ = 112488769344. Its totient is φ = 29461344264.

The previous prime is 61600992623. The next prime is 61600992689. The reversal of 61600992644 is 44629900616.

61600992644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61600992644² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334787912 + ... + 334788095.

It is an arithmetic number, because the mean of its divisors is an integer number (9374064112).

Almost surely, 2^61600992644 is an apocalyptic number.

It is an amenable number.

61600992644 is a deficient number, since it is larger than the sum of its proper divisors (50887776700).

61600992644 is a wasteful number, since it uses less digits than its factorization.

61600992644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669576034 (or 669576032 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 61600992644 in words is "sixty-one billion, six hundred million, nine hundred ninety-two thousand, six hundred forty-four".