631132304525461 has 4 divisors (see below), whose sum is σ = 631133789614924. Its totient is φ = 631130819436000.

The previous prime is 631132304525431. The next prime is 631132304525501. The reversal of 631132304525461 is 164525403231136.

It is a happy number.

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 611575620303025 + 19556684222436 = 24730055^2 + 4422294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631132304525461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631132304525431) 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, 741907080 + ... + 742757281.

It is an arithmetic number, because the mean of its divisors is an integer number (157783447403731).

Almost surely, 2^{631132304525461} is an apocalyptic number.

It is an amenable number.

631132304525461 is a deficient number, since it is larger than the sum of its proper divisors (1485089463).

631132304525461 is a wasteful number, since it uses less digits than its factorization.

631132304525461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485089462.

The product of its (nonzero) digits is 1555200, while the sum is 46.

Adding to 631132304525461 its reverse (164525403231136), we get a palindrome (795657707756597).

The spelling of 631132304525461 in words is "six hundred thirty-one trillion, one hundred thirty-two billion, three hundred four million, five hundred twenty-five thousand, four hundred sixty-one".