61690994831383 has 2 divisors, whose sum is σ = 61690994831384. Its totient is φ = 61690994831382.

The previous prime is 61690994831359. The next prime is 61690994831387. The reversal of 61690994831383 is 38313849909616.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61690994831383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61690994831387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30845497415691 + 30845497415692.

It is an arithmetic number, because the mean of its divisors is an integer number (30845497415692).

Almost surely, 2^{61690994831383} is an apocalyptic number.

61690994831383 is a deficient number, since it is larger than the sum of its proper divisors (1).

61690994831383 is an equidigital number, since it uses as much as digits as its factorization.

61690994831383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181398528, while the sum is 70.

The spelling of 61690994831383 in words is "sixty-one trillion, six hundred ninety billion, nine hundred ninety-four million, eight hundred thirty-one thousand, three hundred eighty-three".