31456487038961 has 4 divisors (see below), whose sum is σ = 31457478107124. Its totient is φ = 31455495970800.

The previous prime is 31456487038931. The next prime is 31456487038967. The reversal of 31456487038961 is 16983078465413.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11217006672400 + 20239480366561 = 3349180^2 + 4498831^2 .

It is a cyclic number.

It is not a de Polignac number, because 31456487038961 - 2¹⁸ = 31456486776817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31456487038967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495486470 + ... + 495549951.

It is an arithmetic number, because the mean of its divisors is an integer number (7864369526781).

Almost surely, 2^{31456487038961} is an apocalyptic number.

It is an amenable number.

31456487038961 is a deficient number, since it is larger than the sum of its proper divisors (991068163).

31456487038961 is an equidigital number, since it uses as much as digits as its factorization.

31456487038961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991068162.

The product of its (nonzero) digits is 104509440, while the sum is 65.

The spelling of 31456487038961 in words is "thirty-one trillion, four hundred fifty-six billion, four hundred eighty-seven million, thirty-eight thousand, nine hundred sixty-one".