631620275651 has 4 divisors (see below), whose sum is σ = 631630857600. Its totient is φ = 631609693704.

The previous prime is 631620275633. The next prime is 631620275669. The reversal of 631620275651 is 156572026136.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (631620275633) and next prime (631620275669).

It is a cyclic number.

It is not a de Polignac number, because 631620275651 - 2¹⁰ = 631620274627 is a prime.

It is a super-2 number, since 2×631620275651² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631620275621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5200931 + ... + 5320988.

It is an arithmetic number, because the mean of its divisors is an integer number (157907714400).

Almost surely, 2^631620275651 is an apocalyptic number.

631620275651 is a deficient number, since it is larger than the sum of its proper divisors (10581949).

631620275651 is a wasteful number, since it uses less digits than its factorization.

631620275651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10581948.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 631620275651 in words is "six hundred thirty-one billion, six hundred twenty million, two hundred seventy-five thousand, six hundred fifty-one".