157508856021 has 16 divisors (see below), whose sum is σ = 229418961408. Its totient is φ = 95328591600.

The previous prime is 157508856019. The next prime is 157508856031. The reversal of 157508856021 is 120658805751.

It is not a de Polignac number, because 157508856021 - 2¹ = 157508856019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157508856031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3258675 + ... + 3306656.

It is an arithmetic number, because the mean of its divisors is an integer number (14338685088).

Almost surely, 2^157508856021 is an apocalyptic number.

157508856021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

157508856021 is a deficient number, since it is larger than the sum of its proper divisors (71910105387).

157508856021 is a wasteful number, since it uses less digits than its factorization.

157508856021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566072.

The product of its (nonzero) digits is 672000, while the sum is 48.

The spelling of 157508856021 in words is "one hundred fifty-seven billion, five hundred eight million, eight hundred fifty-six thousand, twenty-one".