15780053518374 has 16 divisors (see below), whose sum is σ = 33221165302080. Its totient is φ = 4983174795240.

The previous prime is 15780053518363. The next prime is 15780053518399. The reversal of 15780053518374 is 47381535008751.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 69210760932 + ... + 69210761159.

It is an arithmetic number, because the mean of its divisors is an integer number (2076322831380).

Almost surely, 2^{15780053518374} is an apocalyptic number.

15780053518374 is an abundant number, since it is smaller than the sum of its proper divisors (17441111783706).

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

15780053518374 is a wasteful number, since it uses less digits than its factorization.

15780053518374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138421522115.

The product of its (nonzero) digits is 14112000, while the sum is 57.

The spelling of 15780053518374 in words is "fifteen trillion, seven hundred eighty billion, fifty-three million, five hundred eighteen thousand, three hundred seventy-four".