31461428744891 has 2 divisors, whose sum is σ = 31461428744892. Its totient is φ = 31461428744890.

The previous prime is 31461428744873. The next prime is 31461428744951. The reversal of 31461428744891 is 19844782416413.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31461428744891 is a prime.

It is not a weakly prime, because it can be changed into another prime (31461428744491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15730714372445 + 15730714372446.

It is an arithmetic number, because the mean of its divisors is an integer number (15730714372446).

Almost surely, 2^{31461428744891} is an apocalyptic number.

31461428744891 is a deficient number, since it is larger than the sum of its proper divisors (1).

31461428744891 is an equidigital number, since it uses as much as digits as its factorization.

31461428744891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37158912, while the sum is 62.

The spelling of 31461428744891 in words is "thirty-one trillion, four hundred sixty-one billion, four hundred twenty-eight million, seven hundred forty-four thousand, eight hundred ninety-one".