2878915745 has 16 divisors (see below), whose sum is σ = 3726939600. Its totient is φ = 2126751744.

The previous prime is 2878915733. The next prime is 2878915757. The reversal of 2878915745 is 5475198782.

It is an interprime number because it is at equal distance from previous prime (2878915733) and next prime (2878915757).

It can be written as a sum of positive squares in 8 ways, for example, as 234487969 + 2644427776 = 15313^2 + 51424^2 .

It is a cyclic number.

It is not a de Polignac number, because 2878915745 - 2¹² = 2878911649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315020 + ... + 324029.

It is an arithmetic number, because the mean of its divisors is an integer number (232933725).

Almost surely, 2^2878915745 is an apocalyptic number.

It is an amenable number.

2878915745 is a deficient number, since it is larger than the sum of its proper divisors (848023855).

2878915745 is a wasteful number, since it uses less digits than its factorization.

2878915745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639124.

The product of its digits is 5644800, while the sum is 56.

The square root of 2878915745 is about 53655.5285595063. The cubic root of 2878915745 is about 1422.5787540450.

The spelling of 2878915745 in words is "two billion, eight hundred seventy-eight million, nine hundred fifteen thousand, seven hundred forty-five".