2678398515 has 64 divisors (see below), whose sum is σ = 5214988800. Its totient is φ = 1296196992.

The previous prime is 2678398483. The next prime is 2678398519. The reversal of 2678398515 is 5158938762.

2678398515 is a `hidden beast` number, since 26 + 78 + 39 + 8 + 515 = 666.

It is not a de Polignac number, because 2678398515 - 2⁵ = 2678398483 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2678398519) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 90612 + ... + 116478.

It is an arithmetic number, because the mean of its divisors is an integer number (81484200).

Almost surely, 2^2678398515 is an apocalyptic number.

2678398515 is a deficient number, since it is larger than the sum of its proper divisors (2536590285).

2678398515 is a wasteful number, since it uses less digits than its factorization.

2678398515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25953 (or 25947 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 2678398515 is about 51753.2464199107. The cubic root of 2678398515 is about 1388.7531760574.

The spelling of 2678398515 in words is "two billion, six hundred seventy-eight million, three hundred ninety-eight thousand, five hundred fifteen".