78865616451 has 8 divisors (see below), whose sum is σ = 106723620544. Its totient is φ = 51792345000.

The previous prime is 78865616443. The next prime is 78865616477. The reversal of 78865616451 is 15461656887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78865616451 - 2³ = 78865616443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78865616391 and 78865616400.

It is not an unprimeable number, because it can be changed into a prime (78865612451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196182925 + ... + 196183326.

It is an arithmetic number, because the mean of its divisors is an integer number (13340452568).

Almost surely, 2^78865616451 is an apocalyptic number.

78865616451 is a deficient number, since it is larger than the sum of its proper divisors (27858004093).

78865616451 is a wasteful number, since it uses less digits than its factorization.

78865616451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 392366321.

The product of its digits is 9676800, while the sum is 57.

The spelling of 78865616451 in words is "seventy-eight billion, eight hundred sixty-five million, six hundred sixteen thousand, four hundred fifty-one".