78407412365 has 4 divisors (see below), whose sum is σ = 94088894844. Its totient is φ = 62725929888.

The previous prime is 78407412337. The next prime is 78407412373. The reversal of 78407412365 is 56321470487.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50749726729 + 27657685636 = 225277^2 + 166306^2 .

It is a cyclic number.

It is not a de Polignac number, because 78407412365 - 2⁶ = 78407412301 is a prime.

It is a super-2 number, since 2×78407412365² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7840741232 + ... + 7840741241.

It is an arithmetic number, because the mean of its divisors is an integer number (23522223711).

Almost surely, 2^78407412365 is an apocalyptic number.

It is an amenable number.

78407412365 is a deficient number, since it is larger than the sum of its proper divisors (15681482479).

78407412365 is a wasteful number, since it uses less digits than its factorization.

78407412365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15681482478.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 78407412365 in words is "seventy-eight billion, four hundred seven million, four hundred twelve thousand, three hundred sixty-five".