15380642918778 has 16 divisors (see below), whose sum is σ = 30780547776480. Its totient is φ = 5123670649776.

The previous prime is 15380642918747. The next prime is 15380642918863. The reversal of 15380642918778 is 87781924608351.

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, 802570408 + ... + 802589571.

It is an arithmetic number, because the mean of its divisors is an integer number (1923784236030).

It is a 1-persistent number, because it is pandigital, but 2⋅15380642918778 = 30761285837556 is not.

Almost surely, 2^{15380642918778} is an apocalyptic number.

15380642918778 is an abundant number, since it is smaller than the sum of its proper divisors (15399904857702).

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

15380642918778 is a wasteful number, since it uses less digits than its factorization.

15380642918778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1605161581.

The product of its (nonzero) digits is 162570240, while the sum is 69.

The spelling of 15380642918778 in words is "fifteen trillion, three hundred eighty billion, six hundred forty-two million, nine hundred eighteen thousand, seven hundred seventy-eight".