128551363536 has 40 divisors (see below), whose sum is σ = 334128411040. Its totient is φ = 42587565696.

The previous prime is 128551363519. The next prime is 128551363553. The reversal of 128551363536 is 635363155821.

It is an interprime number because it is at equal distance from previous prime (128551363519) and next prime (128551363553).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8207371 + ... + 8223018.

It is an arithmetic number, because the mean of its divisors is an integer number (8353210276).

Almost surely, 2^128551363536 is an apocalyptic number.

128551363536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128551363536 is an abundant number, since it is smaller than the sum of its proper divisors (205577047504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128551363536 is a wasteful number, since it uses less digits than its factorization.

128551363536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16430563 (or 16430557 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 48.

The spelling of 128551363536 in words is "one hundred twenty-eight billion, five hundred fifty-one million, three hundred sixty-three thousand, five hundred thirty-six".