157554891 has 12 divisors (see below), whose sum is σ = 245085568. Its totient is φ = 96956784.

The previous prime is 157554871. The next prime is 157554907. The reversal of 157554891 is 198455751.

157554891 is a `hidden beast` number, since 1 + 5 + 7 + 554 + 8 + 91 = 666.

It is not a de Polignac number, because 157554891 - 2¹⁰ = 157553867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157554811) 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, 673195 + ... + 673428.

Almost surely, 2^157554891 is an apocalyptic number.

157554891 is a deficient number, since it is larger than the sum of its proper divisors (87530677).

157554891 is a wasteful number, since it uses less digits than its factorization.

157554891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346642 (or 1346639 counting only the distinct ones).

The product of its digits is 252000, while the sum is 45.

The square root of 157554891 is about 12552.0871172885. The cubic root of 157554891 is about 540.1038791925.

The spelling of 157554891 in words is "one hundred fifty-seven million, five hundred fifty-four thousand, eight hundred ninety-one".