78893690049 has 12 divisors (see below), whose sum is σ = 120660937956. Its totient is φ = 49501923072.

The previous prime is 78893690047. The next prime is 78893690053. The reversal of 78893690049 is 94009639887.

It can be written as a sum of positive squares in 2 ways, for example, as 70898647824 + 7995042225 = 266268^2 + 89415^2 .

It is not a de Polignac number, because 78893690049 - 2¹ = 78893690047 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78893690047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257822364 + ... + 257822669.

It is an arithmetic number, because the mean of its divisors is an integer number (10055078163).

Almost surely, 2^78893690049 is an apocalyptic number.

It is an amenable number.

78893690049 is a deficient number, since it is larger than the sum of its proper divisors (41767247907).

78893690049 is a wasteful number, since it uses less digits than its factorization.

78893690049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515645056 (or 515645053 counting only the distinct ones).

The product of its (nonzero) digits is 23514624, while the sum is 63.

The spelling of 78893690049 in words is "seventy-eight billion, eight hundred ninety-three million, six hundred ninety thousand, forty-nine".