7978673115 has 24 divisors (see below), whose sum is σ = 15805372128. Its totient is φ = 3647393280.

The previous prime is 7978673107. The next prime is 7978673117. The reversal of 7978673115 is 5113768797.

It is not a de Polignac number, because 7978673115 - 2³ = 7978673107 is a prime.

It is a super-3 number, since 3×7978673115³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7978673117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12664246 + ... + 12664875.

It is an arithmetic number, because the mean of its divisors is an integer number (658557172).

Almost surely, 2^7978673115 is an apocalyptic number.

7978673115 is a deficient number, since it is larger than the sum of its proper divisors (7826699013).

7978673115 is a wasteful number, since it uses less digits than its factorization.

7978673115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25329139 (or 25329136 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 54.

The square root of 7978673115 is about 89323.4186258005. The cubic root of 7978673115 is about 1998.2211779484.

The spelling of 7978673115 in words is "seven billion, nine hundred seventy-eight million, six hundred seventy-three thousand, one hundred fifteen".