61320764 has 6 divisors (see below), whose sum is σ = 107311344. Its totient is φ = 30660380.

The previous prime is 61320739. The next prime is 61320767. The reversal of 61320764 is 46702316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61320767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7665092 + ... + 7665099.

It is an arithmetic number, because the mean of its divisors is an integer number (17885224).

Almost surely, 2^61320764 is an apocalyptic number.

It is an amenable number.

61320764 is a deficient number, since it is larger than the sum of its proper divisors (45990580).

61320764 is a wasteful number, since it uses less digits than its factorization.

61320764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15330195 (or 15330193 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 61320764 is about 7830.7575623307. The cubic root of 61320764 is about 394.3385050738.

The spelling of 61320764 in words is "sixty-one million, three hundred twenty thousand, seven hundred sixty-four".