65631312507 has 8 divisors (see below), whose sum is σ = 88045278784. Its totient is φ = 43485777288.

The previous prime is 65631312469. The next prime is 65631312511. The reversal of 65631312507 is 70521313656.

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

It is not a de Polignac number, because 65631312507 - 2²⁴ = 65614535291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65631312557) 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, 67107193 + ... + 67108170.

It is an arithmetic number, because the mean of its divisors is an integer number (11005659848).

Almost surely, 2^65631312507 is an apocalyptic number.

65631312507 is a deficient number, since it is larger than the sum of its proper divisors (22413966277).

65631312507 is a wasteful number, since it uses less digits than its factorization.

65631312507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134215529.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 65631312507 in words is "sixty-five billion, six hundred thirty-one million, three hundred twelve thousand, five hundred seven".