157645861 has 12 divisors (see below), whose sum is σ = 162761472. Its totient is φ = 152684000.

The previous prime is 157645847. The next prime is 157645867. The reversal of 157645861 is 168546751.

157645861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-157645861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157645867) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 320826 + ... + 321316.

It is an arithmetic number, because the mean of its divisors is an integer number (13563456).

Almost surely, 2^157645861 is an apocalyptic number.

It is an amenable number.

157645861 is a deficient number, since it is larger than the sum of its proper divisors (5115611).

157645861 is an equidigital number, since it uses as much as digits as its factorization.

157645861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 723 counting only the distinct ones).

The product of its digits is 201600, while the sum is 43.

The square root of 157645861 is about 12555.7102945234. The cubic root of 157645861 is about 540.2078086788.

The spelling of 157645861 in words is "one hundred fifty-seven million, six hundred forty-five thousand, eight hundred sixty-one".