664353032054631 has 24 divisors (see below), whose sum is σ = 900645608408832. Its totient is φ = 435601601460000.

The previous prime is 664353032054623. The next prime is 664353032054641. The reversal of 664353032054631 is 136450230353466.

It is not a de Polignac number, because 664353032054631 - 2³ = 664353032054623 is a prime.

It is a super-2 number, since 2×664353032054631² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664353032054641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 119939506 + ... + 125356256.

It is an arithmetic number, because the mean of its divisors is an integer number (37526900350368).

Almost surely, 2^{664353032054631} is an apocalyptic number.

664353032054631 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

664353032054631 is a deficient number, since it is larger than the sum of its proper divisors (236292576354201).

664353032054631 is a wasteful number, since it uses less digits than its factorization.

664353032054631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427863 (or 5427802 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 51.

The spelling of 664353032054631 in words is "six hundred sixty-four trillion, three hundred fifty-three billion, thirty-two million, fifty-four thousand, six hundred thirty-one".