2878152565561 has 8 divisors (see below), whose sum is σ = 3542341619264. Its totient is φ = 2277219612240.

The previous prime is 2878152565553. The next prime is 2878152565571. The reversal of 2878152565561 is 1655652518782.

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

It is a cyclic number.

It is not a de Polignac number, because 2878152565561 - 2³ = 2878152565553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2878152565561.

It is not an unprimeable number, because it can be changed into a prime (2878152565571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15814024995 + ... + 15814025176.

It is an arithmetic number, because the mean of its divisors is an integer number (442792702408).

Almost surely, 2^{2878152565561} is an apocalyptic number.

It is an amenable number.

2878152565561 is a deficient number, since it is larger than the sum of its proper divisors (664189053703).

2878152565561 is a wasteful number, since it uses less digits than its factorization.

2878152565561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31628050191.

The product of its digits is 40320000, while the sum is 61.

The spelling of 2878152565561 in words is "two trillion, eight hundred seventy-eight billion, one hundred fifty-two million, five hundred sixty-five thousand, five hundred sixty-one".