128157623715 has 48 divisors (see below), whose sum is σ = 225442635264. Its totient is φ = 62121956160.

The previous prime is 128157623677. The next prime is 128157623743. The reversal of 128157623715 is 517326751821.

It is not a de Polignac number, because 128157623715 - 2¹¹ = 128157621667 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12531094 + ... + 12541316.

It is an arithmetic number, because the mean of its divisors is an integer number (4696721568).

Almost surely, 2^128157623715 is an apocalyptic number.

128157623715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128157623715 is a deficient number, since it is larger than the sum of its proper divisors (97285011549).

128157623715 is a wasteful number, since it uses less digits than its factorization.

128157623715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17160 (or 17149 counting only the distinct ones).

The product of its digits is 705600, while the sum is 48.

The spelling of 128157623715 in words is "one hundred twenty-eight billion, one hundred fifty-seven million, six hundred twenty-three thousand, seven hundred fifteen".