631155653461 has 4 divisors (see below), whose sum is σ = 631473297952. Its totient is φ = 630838008972.

The previous prime is 631155653449. The next prime is 631155653483. The reversal of 631155653461 is 164356551136.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631155653461 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 (631155653441) 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, 158819265 + ... + 158823238.

It is an arithmetic number, because the mean of its divisors is an integer number (157868324488).

Almost surely, 2^631155653461 is an apocalyptic number.

It is an amenable number.

631155653461 is a deficient number, since it is larger than the sum of its proper divisors (317644491).

631155653461 is a wasteful number, since it uses less digits than its factorization.

631155653461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317644490.

The product of its digits is 972000, while the sum is 46.

The spelling of 631155653461 in words is "six hundred thirty-one billion, one hundred fifty-five million, six hundred fifty-three thousand, four hundred sixty-one".