61690059907204 has 81 divisors (see below), whose sum is σ = 112555852097871. Its totient is φ = 29583699741120.

The previous prime is 61690059907163. The next prime is 61690059907219. The reversal of 61690059907204 is 40270995009616.

The square root of 61690059907204 is 7854302.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 8789457948804 + 52900601958400 = 2964702^2 + 7273280^2 .

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 87009957202 + ... + 87009957910.

Almost surely, 2^{61690059907204} is an apocalyptic number.

61690059907204 is the 7854302-nd square number.

It is an amenable number.

61690059907204 is a deficient number, since it is larger than the sum of its proper divisors (50865792190667).

61690059907204 is an frugal number, since it uses more digits than its factorization.

61690059907204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1862 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 61690059907204 in words is "sixty-one trillion, six hundred ninety billion, fifty-nine million, nine hundred seven thousand, two hundred four".