61765864 has 16 divisors (see below), whose sum is σ = 116590500. Its totient is φ = 30675072.

The previous prime is 61765783. The next prime is 61765867. The reversal of 61765864 is 46856716.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56881764 + 4884100 = 7542^2 + 2210^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 61765864.

It is not an unprimeable number, because it can be changed into a prime (61765867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24717 + ... + 27100.

Almost surely, 2^61765864 is an apocalyptic number.

It is an amenable number.

61765864 is a deficient number, since it is larger than the sum of its proper divisors (54824636).

61765864 is a wasteful number, since it uses less digits than its factorization.

61765864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51972 (or 51968 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The square root of 61765864 is about 7859.1261600766. The cubic root of 61765864 is about 395.2903148012.

The spelling of 61765864 in words is "sixty-one million, seven hundred sixty-five thousand, eight hundred sixty-four".