12157295397 has 8 divisors (see below), whose sum is σ = 17456629344. Its totient is φ = 7481412528.

The previous prime is 12157295363. The next prime is 12157295399. The reversal of 12157295397 is 79359275121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12157295397 - 2¹⁵ = 12157262629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12157295399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155862723 + ... + 155862800.

It is an arithmetic number, because the mean of its divisors is an integer number (2182078668).

Almost surely, 2^12157295397 is an apocalyptic number.

It is an amenable number.

12157295397 is a deficient number, since it is larger than the sum of its proper divisors (5299333947).

12157295397 is a wasteful number, since it uses less digits than its factorization.

12157295397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311725539.

The product of its digits is 1190700, while the sum is 51.

The spelling of 12157295397 in words is "twelve billion, one hundred fifty-seven million, two hundred ninety-five thousand, three hundred ninety-seven".