157872805 has 16 divisors (see below), whose sum is σ = 208091520. Its totient is φ = 114447168.

The previous prime is 157872791. The next prime is 157872817. The reversal of 157872805 is 508278751.

157872805 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157872805 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33942 + ... + 38311.

It is an arithmetic number, because the mean of its divisors is an integer number (13005720).

Almost surely, 2^157872805 is an apocalyptic number.

It is an amenable number.

157872805 is a deficient number, since it is larger than the sum of its proper divisors (50218715).

157872805 is a wasteful number, since it uses less digits than its factorization.

157872805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72300.

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 157872805 is about 12564.7445258549. The cubic root of 157872805 is about 540.4669087016.

The spelling of 157872805 in words is "one hundred fifty-seven million, eight hundred seventy-two thousand, eight hundred five".