157656641 has 4 divisors (see below), whose sum is σ = 159187392. Its totient is φ = 156125892.

The previous prime is 157656637. The next prime is 157656649. The reversal of 157656641 is 146656751.

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 157656641 - 2² = 157656637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157656649) 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, 765221 + ... + 765426.

It is an arithmetic number, because the mean of its divisors is an integer number (39796848).

Almost surely, 2^157656641 is an apocalyptic number.

It is an amenable number.

157656641 is a deficient number, since it is larger than the sum of its proper divisors (1530751).

157656641 is a wasteful number, since it uses less digits than its factorization.

157656641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1530750.

The product of its digits is 151200, while the sum is 41.

The square root of 157656641 is about 12556.1395739296. The cubic root of 157656641 is about 540.2201217359.

The spelling of 157656641 in words is "one hundred fifty-seven million, six hundred fifty-six thousand, six hundred forty-one".