61656816874 has 8 divisors (see below), whose sum is σ = 92487908448. Its totient is φ = 30827514060.

The previous prime is 61656816827. The next prime is 61656816901. The reversal of 61656816874 is 47861865616.

61656816874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×61656816874² (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, 357412 + ... + 501055.

It is an arithmetic number, because the mean of its divisors is an integer number (11560988556).

Almost surely, 2^61656816874 is an apocalyptic number.

61656816874 is a deficient number, since it is larger than the sum of its proper divisors (30831091574).

61656816874 is a wasteful number, since it uses less digits than its factorization.

61656816874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894380.

The product of its digits is 11612160, while the sum is 58.

The spelling of 61656816874 in words is "sixty-one billion, six hundred fifty-six million, eight hundred sixteen thousand, eight hundred seventy-four".