157144907909 has 16 divisors (see below), whose sum is σ = 173276750976. Its totient is φ = 141322060800.

The previous prime is 157144907873. The next prime is 157144907917. The reversal of 157144907909 is 909709441751.

It is a cyclic number.

It is not a de Polignac number, because 157144907909 - 2²⁸ = 156876472453 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 (157144907009) 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, 2401544 + ... + 2466110.

It is an arithmetic number, because the mean of its divisors is an integer number (10829796936).

Almost surely, 2^157144907909 is an apocalyptic number.

It is an amenable number.

157144907909 is a deficient number, since it is larger than the sum of its proper divisors (16131843067).

157144907909 is a wasteful number, since it uses less digits than its factorization.

157144907909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66956.

The product of its (nonzero) digits is 2857680, while the sum is 56.

The spelling of 157144907909 in words is "one hundred fifty-seven billion, one hundred forty-four million, nine hundred seven thousand, nine hundred nine".