631072735270521 has 8 divisors (see below), whose sum is σ = 841431437383584. Its totient is φ = 420714595002240.

The previous prime is 631072735270501. The next prime is 631072735270529. The reversal of 631072735270521 is 125072537270136.

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

It is not a de Polignac number, because 631072735270521 - 2¹⁵ = 631072735237753 is a prime.

It is a super-2 number, since 2×631072735270521² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (631072735270529) 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, 137833335 + ... + 142338236.

It is an arithmetic number, because the mean of its divisors is an integer number (105178929672948).

Almost surely, 2^{631072735270521} is an apocalyptic number.

It is an amenable number.

631072735270521 is a deficient number, since it is larger than the sum of its proper divisors (210358702113063).

631072735270521 is a wasteful number, since it uses less digits than its factorization.

631072735270521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280922391.

The product of its (nonzero) digits is 3704400, while the sum is 51.

The spelling of 631072735270521 in words is "six hundred thirty-one trillion, seventy-two billion, seven hundred thirty-five million, two hundred seventy thousand, five hundred twenty-one".