157285258991 has 4 divisors (see below), whose sum is σ = 179754581712. Its totient is φ = 134815936272.

The previous prime is 157285258987. The next prime is 157285259017. The reversal of 157285258991 is 199852582751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199852582751 = 113 ⋅1768606927.

It is a cyclic number.

It is not a de Polignac number, because 157285258991 - 2² = 157285258987 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 (157285252991) 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, 11234661350 + ... + 11234661363.

It is an arithmetic number, because the mean of its divisors is an integer number (44938645428).

Almost surely, 2^157285258991 is an apocalyptic number.

157285258991 is a deficient number, since it is larger than the sum of its proper divisors (22469322721).

157285258991 is an equidigital number, since it uses as much as digits as its factorization.

157285258991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22469322720.

The product of its digits is 18144000, while the sum is 62.

The spelling of 157285258991 in words is "one hundred fifty-seven billion, two hundred eighty-five million, two hundred fifty-eight thousand, nine hundred ninety-one".