157218415873 has 4 divisors (see below), whose sum is σ = 165493069360. Its totient is φ = 148943762388.

The previous prime is 157218415841. The next prime is 157218415891. The reversal of 157218415873 is 378514812751.

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 157218415873 - 2⁵ = 157218415841 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 157218415873.

It is not an unprimeable number, because it can be changed into a prime (157218415813) 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, 4137326715 + ... + 4137326752.

It is an arithmetic number, because the mean of its divisors is an integer number (41373267340).

Almost surely, 2^157218415873 is an apocalyptic number.

It is an amenable number.

157218415873 is a deficient number, since it is larger than the sum of its proper divisors (8274653487).

157218415873 is an equidigital number, since it uses as much as digits as its factorization.

157218415873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8274653486.

The product of its digits is 1881600, while the sum is 52.

The spelling of 157218415873 in words is "one hundred fifty-seven billion, two hundred eighteen million, four hundred fifteen thousand, eight hundred seventy-three".