78960437986 has 4 divisors (see below), whose sum is σ = 118440656982. Its totient is φ = 39480218992.

The previous prime is 78960437971. The next prime is 78960437987. The reversal of 78960437986 is 68973406987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68973406987 = 739 ⋅93333433.

It can be written as a sum of positive squares in only one way, i.e., 49364396761 + 29596041225 = 222181^2 + 172035^2 .

It is not an unprimeable number, because it can be changed into a prime (78960437987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19740109495 + ... + 19740109498.

Almost surely, 2^78960437986 is an apocalyptic number.

78960437986 is a deficient number, since it is larger than the sum of its proper divisors (39480218996).

78960437986 is a wasteful number, since it uses less digits than its factorization.

78960437986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39480218995.

The product of its (nonzero) digits is 109734912, while the sum is 67.

The spelling of 78960437986 in words is "seventy-eight billion, nine hundred sixty million, four hundred thirty-seven thousand, nine hundred eighty-six".