31516862261653 has 4 divisors (see below), whose sum is σ = 31526550817708. Its totient is φ = 31507173705600.

The previous prime is 31516862261627. The next prime is 31516862261671. The reversal of 31516862261653 is 35616226861513.

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 25287954436369 + 6228907825284 = 5028713^2 + 2495778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31516862261653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31516862261594 and 31516862261603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31516862264653) 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, 4844273148 + ... + 4844279653.

It is an arithmetic number, because the mean of its divisors is an integer number (7881637704427).

Almost surely, 2^{31516862261653} is an apocalyptic number.

It is an amenable number.

31516862261653 is a deficient number, since it is larger than the sum of its proper divisors (9688556055).

31516862261653 is an equidigital number, since it uses as much as digits as its factorization.

31516862261653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9688556054.

The product of its digits is 9331200, while the sum is 55.

The spelling of 31516862261653 in words is "thirty-one trillion, five hundred sixteen billion, eight hundred sixty-two million, two hundred sixty-one thousand, six hundred fifty-three".