631620436353 has 8 divisors (see below), whose sum is σ = 842309580288. Its totient is φ = 421005791664.

The previous prime is 631620436243. The next prime is 631620436357. The reversal of 631620436353 is 353634026136.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 631620436353 - 2²⁵ = 631586881921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631620436357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18605025 + ... + 18638942.

It is an arithmetic number, because the mean of its divisors is an integer number (105288697536).

Almost surely, 2^631620436353 is an apocalyptic number.

It is an amenable number.

631620436353 is a deficient number, since it is larger than the sum of its proper divisors (210689143935).

631620436353 is a wasteful number, since it uses less digits than its factorization.

631620436353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37249623.

The product of its (nonzero) digits is 699840, while the sum is 42.

The spelling of 631620436353 in words is "six hundred thirty-one billion, six hundred twenty million, four hundred thirty-six thousand, three hundred fifty-three".