128801505015 has 24 divisors (see below), whose sum is σ = 223268786208. Its totient is φ = 68690184000.

The previous prime is 128801505013. The next prime is 128801505017. The reversal of 128801505015 is 510505108821.

128801505015 is a `hidden beast` number, since 1 + 28 + 80 + 1 + 50 + 501 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (128801505013) and next prime (128801505017).

It is not a de Polignac number, because 128801505015 - 2¹ = 128801505013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128801505011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 816337 + ... + 961253.

It is an arithmetic number, because the mean of its divisors is an integer number (9302866092).

Almost surely, 2^128801505015 is an apocalyptic number.

128801505015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128801505015 is a deficient number, since it is larger than the sum of its proper divisors (94467281193).

128801505015 is a wasteful number, since it uses less digits than its factorization.

128801505015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164679 (or 164676 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 36.

The spelling of 128801505015 in words is "one hundred twenty-eight billion, eight hundred one million, five hundred five thousand, fifteen".