61368919331 has 2 divisors, whose sum is σ = 61368919332. Its totient is φ = 61368919330.

The previous prime is 61368919321. The next prime is 61368919471. The reversal of 61368919331 is 13391986316.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61368919331 is a prime.

It is a super-2 number, since 2×61368919331² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61368919331.

It is not a weakly prime, because it can be changed into another prime (61368919321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30684459665 + 30684459666.

It is an arithmetic number, because the mean of its divisors is an integer number (30684459666).

Almost surely, 2^61368919331 is an apocalyptic number.

61368919331 is a deficient number, since it is larger than the sum of its proper divisors (1).

61368919331 is an equidigital number, since it uses as much as digits as its factorization.

61368919331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 629856, while the sum is 50.

The spelling of 61368919331 in words is "sixty-one billion, three hundred sixty-eight million, nine hundred nineteen thousand, three hundred thirty-one".