157655807 has 4 divisors (see below), whose sum is σ = 166929696. Its totient is φ = 148381920.

The previous prime is 157655791. The next prime is 157655821. The reversal of 157655807 is 708556751.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157655807 - 2⁴ = 157655791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157655207) 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 3 ways as a sum of consecutive naturals, for example, 4636919 + ... + 4636952.

It is an arithmetic number, because the mean of its divisors is an integer number (41732424).

Almost surely, 2^157655807 is an apocalyptic number.

157655807 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

157655807 is a deficient number, since it is larger than the sum of its proper divisors (9273889).

157655807 is an equidigital number, since it uses as much as digits as its factorization.

157655807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9273888.

The product of its (nonzero) digits is 294000, while the sum is 44.

The square root of 157655807 is about 12556.1063630411. The cubic root of 157655807 is about 540.2191691502.

The spelling of 157655807 in words is "one hundred fifty-seven million, six hundred fifty-five thousand, eight hundred seven".