157791620473 has 4 divisors (see below), whose sum is σ = 157797813888. Its totient is φ = 157785427060.

The previous prime is 157791620449. The next prime is 157791620477. The reversal of 157791620473 is 374026197751.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157791620473 - 2³⁷ = 20352667001 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 157791620473.

It is not an unprimeable number, because it can be changed into a prime (157791620477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3058333 + ... + 3109498.

It is an arithmetic number, because the mean of its divisors is an integer number (39449453472).

Almost surely, 2^157791620473 is an apocalyptic number.

It is an amenable number.

157791620473 is a deficient number, since it is larger than the sum of its proper divisors (6193415).

157791620473 is an equidigital number, since it uses as much as digits as its factorization.

157791620473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6193414.

The product of its (nonzero) digits is 2222640, while the sum is 52.

The spelling of 157791620473 in words is "one hundred fifty-seven billion, seven hundred ninety-one million, six hundred twenty thousand, four hundred seventy-three".