61777896 has 32 divisors (see below), whose sum is σ = 156310560. Its totient is φ = 20343872.

The previous prime is 61777889. The next prime is 61777943. The reversal of 61777896 is 69877716.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13515 + ... + 17498.

It is an arithmetic number, because the mean of its divisors is an integer number (4884705).

Almost surely, 2^61777896 is an apocalyptic number.

It is an amenable number.

61777896 is an abundant number, since it is smaller than the sum of its proper divisors (94532664).

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

61777896 is a wasteful number, since it uses less digits than its factorization.

61777896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31105 (or 31101 counting only the distinct ones).

The product of its digits is 889056, while the sum is 51.

The square root of 61777896 is about 7859.8916023060. The cubic root of 61777896 is about 395.3159806731.

The spelling of 61777896 in words is "sixty-one million, seven hundred seventy-seven thousand, eight hundred ninety-six".