61776464 has 20 divisors (see below), whose sum is σ = 119813760. Its totient is φ = 30856800.

The previous prime is 61776439. The next prime is 61776493. The reversal of 61776464 is 46467716.

It is a happy number.

It is a congruent number.

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, 30227 + ... + 32205.

It is an arithmetic number, because the mean of its divisors is an integer number (5990688).

Almost surely, 2^61776464 is an apocalyptic number.

It is an amenable number.

61776464 is a deficient number, since it is larger than the sum of its proper divisors (58037296).

61776464 is a wasteful number, since it uses less digits than its factorization.

61776464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938 (or 3932 counting only the distinct ones).

The product of its digits is 169344, while the sum is 41.

The square root of 61776464 is about 7859.8005063742. The cubic root of 61776464 is about 395.3129261995.

The spelling of 61776464 in words is "sixty-one million, seven hundred seventy-six thousand, four hundred sixty-four".