2159542157478 has 16 divisors (see below), whose sum is σ = 4329392397120. Its totient is φ = 718129372136.

The previous prime is 2159542157441. The next prime is 2159542157497. The reversal of 2159542157478 is 8747512459512.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429500700 + ... + 429505727.

It is an arithmetic number, because the mean of its divisors is an integer number (270587024820).

Almost surely, 2^{2159542157478} is an apocalyptic number.

2159542157478 is an abundant number, since it is smaller than the sum of its proper divisors (2169850239642).

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

2159542157478 is a wasteful number, since it uses less digits than its factorization.

2159542157478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859006851.

The product of its digits is 28224000, while the sum is 60.

The spelling of 2159542157478 in words is "two trillion, one hundred fifty-nine billion, five hundred forty-two million, one hundred fifty-seven thousand, four hundred seventy-eight".