158640157923 has 32 divisors (see below), whose sum is σ = 232690655232. Its totient is φ = 95525808000.

The previous prime is 158640157883. The next prime is 158640157967. The reversal of 158640157923 is 329751046851.

It is not a de Polignac number, because 158640157923 - 2³⁰ = 157566416099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158640150923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12056398 + ... + 12069548.

It is an arithmetic number, because the mean of its divisors is an integer number (7271582976).

It is a 1-persistent number, because it is pandigital, but 2⋅158640157923 = 317280315846 is not.

Almost surely, 2^158640157923 is an apocalyptic number.

158640157923 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

158640157923 is a deficient number, since it is larger than the sum of its proper divisors (74050497309).

158640157923 is a wasteful number, since it uses less digits than its factorization.

158640157923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19795.

The product of its (nonzero) digits is 1814400, while the sum is 51.

The spelling of 158640157923 in words is "one hundred fifty-eight billion, six hundred forty million, one hundred fifty-seven thousand, nine hundred twenty-three".