128378815030 has 24 divisors (see below), whose sum is σ = 241565742432. Its totient is φ = 49118848944.

The previous prime is 128378814979. The next prime is 128378815043. The reversal of 128378815030 is 30518873821.

It is a super-2 number, since 2×128378815030² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12128814 + ... + 12139393.

It is an arithmetic number, because the mean of its divisors is an integer number (10065239268).

Almost surely, 2^128378815030 is an apocalyptic number.

128378815030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128378815030 is a deficient number, since it is larger than the sum of its proper divisors (113186927402).

128378815030 is a wasteful number, since it uses less digits than its factorization.

128378815030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24268260 (or 24268237 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 128378815030 in words is "one hundred twenty-eight billion, three hundred seventy-eight million, eight hundred fifteen thousand, thirty".