78424792451 has 8 divisors (see below), whose sum is σ = 78533598000. Its totient is φ = 78316028928.

The previous prime is 78424792399. The next prime is 78424792471. The reversal of 78424792451 is 15429742487.

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 78424792451 - 2⁶ = 78424792387 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78424792393 and 78424792402.

It is not an unprimeable number, because it can be changed into a prime (78424792471) 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, 5912675 + ... + 5925923.

It is an arithmetic number, because the mean of its divisors is an integer number (9816699750).

Almost surely, 2^78424792451 is an apocalyptic number.

78424792451 is a deficient number, since it is larger than the sum of its proper divisors (108805549).

78424792451 is a wasteful number, since it uses less digits than its factorization.

78424792451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21013.

The product of its digits is 4515840, while the sum is 53.

The spelling of 78424792451 in words is "seventy-eight billion, four hundred twenty-four million, seven hundred ninety-two thousand, four hundred fifty-one".