61978896 has 60 divisors (see below), whose sum is σ = 198237312. Its totient is φ = 17707968.

The previous prime is 61978883. The next prime is 61978901. The reversal of 61978896 is 69887916.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29736 + ... + 31751.

Almost surely, 2^61978896 is an apocalyptic number.

It is an amenable number.

61978896 is an abundant number, since it is smaller than the sum of its proper divisors (136258416).

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

61978896 is a wasteful number, since it uses less digits than its factorization.

61978896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61508 (or 61499 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 61978896 is about 7872.6676546137. The cubic root of 61978896 is about 395.7442486973.

The spelling of 61978896 in words is "sixty-one million, nine hundred seventy-eight thousand, eight hundred ninety-six".