2516405878 has 12 divisors (see below), whose sum is σ = 4390871652. Its totient is φ = 1078459620.

The previous prime is 2516405851. The next prime is 2516405917. The reversal of 2516405878 is 8785046152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12838708 + ... + 12838903.

It is an arithmetic number, because the mean of its divisors is an integer number (365905971).

Almost surely, 2^2516405878 is an apocalyptic number.

2516405878 is a deficient number, since it is larger than the sum of its proper divisors (1874465774).

2516405878 is a wasteful number, since it uses less digits than its factorization.

2516405878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25677627 (or 25677620 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 46.

The square root of 2516405878 is about 50163.7905066992. The cubic root of 2516405878 is about 1360.1711646594.

The spelling of 2516405878 in words is "two billion, five hundred sixteen million, four hundred five thousand, eight hundred seventy-eight".