61715970 has 24 divisors (see below), whose sum is σ = 160461756. Its totient is φ = 16457568.

The previous prime is 61715921. The next prime is 61715977. The reversal of 61715970 is 7951716.

61715970 is a `hidden beast` number, since 61 + 7 + 1 + 597 + 0 = 666.

61715970 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49999041 + 11716929 = 7071^2 + 3423^2 .

It is not an unprimeable number, because it can be changed into a prime (61715977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342777 + ... + 342956.

Almost surely, 2^61715970 is an apocalyptic number.

61715970 is an abundant number, since it is smaller than the sum of its proper divisors (98745786).

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

61715970 is a wasteful number, since it uses less digits than its factorization.

61715970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685746 (or 685743 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 61715970 is about 7855.9512473029. The cubic root of 61715970 is about 395.1838486149.

The spelling of 61715970 in words is "sixty-one million, seven hundred fifteen thousand, nine hundred seventy".