157891911 has 16 divisors (see below), whose sum is σ = 212590560. Its totient is φ = 104232960.

The previous prime is 157891883. The next prime is 157891961. The reversal of 157891911 is 119198751.

It is not a de Polignac number, because 157891911 - 2¹⁸ = 157629767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157891961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169495 + ... + 170423.

It is an arithmetic number, because the mean of its divisors is an integer number (13286910).

Almost surely, 2^157891911 is an apocalyptic number.

157891911 is a deficient number, since it is larger than the sum of its proper divisors (54698649).

157891911 is a wasteful number, since it uses less digits than its factorization.

157891911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426.

The product of its digits is 22680, while the sum is 42.

The square root of 157891911 is about 12565.5048048218. The cubic root of 157891911 is about 540.4887105233.

The spelling of 157891911 in words is "one hundred fifty-seven million, eight hundred ninety-one thousand, nine hundred eleven".