663151431923 has 4 divisors (see below), whose sum is σ = 672491593008. Its totient is φ = 653811270840.

The previous prime is 663151431907. The next prime is 663151431931. The reversal of 663151431923 is 329134151366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 663151431923 - 2⁴ = 663151431907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663151491923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4670080436 + ... + 4670080577.

It is an arithmetic number, because the mean of its divisors is an integer number (168122898252).

Almost surely, 2^663151431923 is an apocalyptic number.

663151431923 is a deficient number, since it is larger than the sum of its proper divisors (9340161085).

663151431923 is an equidigital number, since it uses as much as digits as its factorization.

663151431923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9340161084.

The product of its digits is 349920, while the sum is 44.

The spelling of 663151431923 in words is "six hundred sixty-three billion, one hundred fifty-one million, four hundred thirty-one thousand, nine hundred twenty-three".