61617992 has 16 divisors (see below), whose sum is σ = 115655040. Its totient is φ = 30776656.

The previous prime is 61617971. The next prime is 61618009. The reversal of 61617992 is 29971616.

61617992 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 2×61617992² = 7593553876224128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5333 + ... + 12315.

It is an arithmetic number, because the mean of its divisors is an integer number (7228440).

Almost surely, 2^61617992 is an apocalyptic number.

It is an amenable number.

61617992 is a deficient number, since it is larger than the sum of its proper divisors (54037048).

61617992 is a wasteful number, since it uses less digits than its factorization.

61617992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8092 (or 8088 counting only the distinct ones).

The product of its digits is 40824, while the sum is 41.

The square root of 61617992 is about 7849.7128609905. The cubic root of 61617992 is about 394.9746114110.

The spelling of 61617992 in words is "sixty-one million, six hundred seventeen thousand, nine hundred ninety-two".