61690994831384 has 32 divisors (see below), whose sum is σ = 118887741668880. Its totient is φ = 29988872751744.

The previous prime is 61690994831383. The next prime is 61690994831387. The reversal of 61690994831384 is 48313849909616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61690994831383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79343627 + ... + 80117370.

Almost surely, 2^{61690994831384} is an apocalyptic number.

It is an amenable number.

61690994831384 is a deficient number, since it is larger than the sum of its proper divisors (57196746837496).

61690994831384 is a wasteful number, since it uses less digits than its factorization.

61690994831384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159462347 (or 159462343 counting only the distinct ones).

The product of its (nonzero) digits is 241864704, while the sum is 71.

The spelling of 61690994831384 in words is "sixty-one trillion, six hundred ninety billion, nine hundred ninety-four million, eight hundred thirty-one thousand, three hundred eighty-four".