157542804321 has 24 divisors (see below), whose sum is σ = 245778033600. Its totient is φ = 87930845856.

The previous prime is 157542804319. The next prime is 157542804323. The reversal of 157542804321 is 123408245751.

It is an interprime number because it is at equal distance from previous prime (157542804319) and next prime (157542804323).

It is not a de Polignac number, because 157542804321 - 2¹ = 157542804319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157542804323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1989846 + ... + 2067503.

It is an arithmetic number, because the mean of its divisors is an integer number (10240751400).

Almost surely, 2^157542804321 is an apocalyptic number.

It is an amenable number.

157542804321 is a deficient number, since it is larger than the sum of its proper divisors (88235229279).

157542804321 is an equidigital number, since it uses as much as digits as its factorization.

157542804321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057445 (or 4057402 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 157542804321 in words is "one hundred fifty-seven billion, five hundred forty-two million, eight hundred four thousand, three hundred twenty-one".