15728730015874 has 8 divisors (see below), whose sum is σ = 23593121819388. Its totient is φ = 7864356076080.

The previous prime is 15728730015851. The next prime is 15728730015893. The reversal of 15728730015874 is 47851003782751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15515602830225 + 213127185649 = 3938985^2 + 461657^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990237 + ... + 5951344.

Almost surely, 2^{15728730015874} is an apocalyptic number.

15728730015874 is a deficient number, since it is larger than the sum of its proper divisors (7864391803514).

15728730015874 is an equidigital number, since it uses as much as digits as its factorization.

15728730015874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8931860.

The product of its (nonzero) digits is 13171200, while the sum is 58.

The spelling of 15728730015874 in words is "fifteen trillion, seven hundred twenty-eight billion, seven hundred thirty million, fifteen thousand, eight hundred seventy-four".