78619689251 has 16 divisors (see below), whose sum is σ = 83814302880. Its totient is φ = 73490135040.

The previous prime is 78619689241. The next prime is 78619689259. The reversal of 78619689251 is 15298691687.

It is not a de Polignac number, because 78619689251 - 2²⁶ = 78552580387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78619689259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1439735 + ... + 1493343.

It is an arithmetic number, because the mean of its divisors is an integer number (5238393930).

Almost surely, 2^78619689251 is an apocalyptic number.

78619689251 is a deficient number, since it is larger than the sum of its proper divisors (5194613629).

78619689251 is a wasteful number, since it uses less digits than its factorization.

78619689251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54214.

The product of its digits is 13063680, while the sum is 62.

The spelling of 78619689251 in words is "seventy-eight billion, six hundred nineteen million, six hundred eighty-nine thousand, two hundred fifty-one".