78808651 has 8 divisors (see below), whose sum is σ = 84621024. Its totient is φ = 73127040.

The previous prime is 78808643. The next prime is 78808673. The reversal of 78808651 is 15680887.

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

It is a cyclic number.

It is not a de Polignac number, because 78808651 - 2³ = 78808643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78808598 and 78808607.

It is not an unprimeable number, because it can be changed into a prime (78808621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31440 + ... + 33853.

It is an arithmetic number, because the mean of its divisors is an integer number (10577628).

Almost surely, 2^78808651 is an apocalyptic number.

78808651 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

78808651 is a deficient number, since it is larger than the sum of its proper divisors (5812373).

78808651 is a wasteful number, since it uses less digits than its factorization.

78808651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65381.

The product of its (nonzero) digits is 107520, while the sum is 43.

The square root of 78808651 is about 8877.4236690607. The cubic root of 78808651 is about 428.7373288563.

The spelling of 78808651 in words is "seventy-eight million, eight hundred eight thousand, six hundred fifty-one".