12478661157 has 16 divisors (see below), whose sum is σ = 16715540160. Its totient is φ = 8280480000.

The previous prime is 12478661137. The next prime is 12478661177. The reversal of 12478661157 is 75116687421.

It is an interprime number because it is at equal distance from previous prime (12478661137) and next prime (12478661177).

It is not a de Polignac number, because 12478661157 - 2⁶ = 12478661093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12478661137) 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, 2347819 + ... + 2353127.

It is an arithmetic number, because the mean of its divisors is an integer number (1044721260).

Almost surely, 2^12478661157 is an apocalyptic number.

It is an amenable number.

12478661157 is a deficient number, since it is larger than the sum of its proper divisors (4236879003).

12478661157 is a wasteful number, since it uses less digits than its factorization.

12478661157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8804.

The product of its digits is 564480, while the sum is 48.

The spelling of 12478661157 in words is "twelve billion, four hundred seventy-eight million, six hundred sixty-one thousand, one hundred fifty-seven".