61939968 has 36 divisors (see below), whose sum is σ = 164852688. Its totient is φ = 20646400.

The previous prime is 61939931. The next prime is 61939973. The reversal of 61939968 is 86993916.

It is a self number, because there is not a number n which added to its sum of digits gives 61939968.

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, 39558 + ... + 41093.

Almost surely, 2^61939968 is an apocalyptic number.

It is an amenable number.

61939968 is an abundant number, since it is smaller than the sum of its proper divisors (102912720).

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

61939968 is an equidigital number, since it uses as much as digits as its factorization.

61939968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80670 (or 80656 counting only the distinct ones).

The product of its digits is 629856, while the sum is 51.

The square root of 61939968 is about 7870.1949149942. The cubic root of 61939968 is about 395.6613777011.

It can be divided in two parts, 6193 and 9968, that added together give a palindrome (16161).

The spelling of 61939968 in words is "sixty-one million, nine hundred thirty-nine thousand, nine hundred sixty-eight".