631264013969 has 8 divisors (see below), whose sum is σ = 643238404200. Its totient is φ = 619291984896.

The previous prime is 631264013957. The next prime is 631264014013. The reversal of 631264013969 is 969310462136.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 71670250369 + 559593763600 = 267713^2 + 748060^2 .

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

It is not a de Polignac number, because 631264013969 - 2²⁰ = 631262965393 is a prime.

It is a super-2 number, since 2×631264013969² (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 (631264013069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45794 + ... + 1124555.

It is an arithmetic number, because the mean of its divisors is an integer number (80404800525).

Almost surely, 2^631264013969 is an apocalyptic number.

It is an amenable number.

631264013969 is a deficient number, since it is larger than the sum of its proper divisors (11974390231).

631264013969 is a wasteful number, since it uses less digits than its factorization.

631264013969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180579.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 631264013969 in words is "six hundred thirty-one billion, two hundred sixty-four million, thirteen thousand, nine hundred sixty-nine".