15328078578 has 160 divisors (see below), whose sum is σ = 36349948800. Its totient is φ = 4822177536.

The previous prime is 15328078517. The next prime is 15328078583. The reversal of 15328078578 is 87587082351.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 31474251 + ... + 31474737.

It is an arithmetic number, because the mean of its divisors is an integer number (227187180).

Almost surely, 2^15328078578 is an apocalyptic number.

15328078578 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15328078578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18174974400).

15328078578 is an abundant number, since it is smaller than the sum of its proper divisors (21021870222).

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

15328078578 is a wasteful number, since it uses less digits than its factorization.

15328078578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 54.

The spelling of 15328078578 in words is "fifteen billion, three hundred twenty-eight million, seventy-eight thousand, five hundred seventy-eight".