78408792451 has 8 divisors (see below), whose sum is σ = 85746006000. Its totient is φ = 71106435840.

The previous prime is 78408792443. The next prime is 78408792457. The reversal of 78408792451 is 15429780487.

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

It is not a de Polignac number, because 78408792451 - 2³ = 78408792443 is a prime.

It is a super-2 number, since 2×78408792451² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78408792392 and 78408792401.

It is not an unprimeable number, because it can be changed into a prime (78408792457) 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, 8709526 + ... + 8718523.

It is an arithmetic number, because the mean of its divisors is an integer number (10718250750).

Almost surely, 2^78408792451 is an apocalyptic number.

78408792451 is a deficient number, since it is larger than the sum of its proper divisors (7337213549).

78408792451 is a wasteful number, since it uses less digits than its factorization.

78408792451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17428469.

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 78408792451 in words is "seventy-eight billion, four hundred eight million, seven hundred ninety-two thousand, four hundred fifty-one".