78214266765431 has 16 divisors (see below), whose sum is σ = 81839379148800. Its totient is φ = 74659910738400.

The previous prime is 78214266765421. The next prime is 78214266765533. The reversal of 78214266765431 is 13456766241287.

It is a cyclic number.

It is not a de Polignac number, because 78214266765431 - 2³⁰ = 78213193023607 is a prime.

It is a super-2 number, since 2×78214266765431² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78214266765421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13139741 + ... + 18140598.

It is an arithmetic number, because the mean of its divisors is an integer number (5114961196800).

Almost surely, 2^{78214266765431} is an apocalyptic number.

78214266765431 is a deficient number, since it is larger than the sum of its proper divisors (3625112383369).

78214266765431 is a wasteful number, since it uses less digits than its factorization.

78214266765431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31281470.

The product of its digits is 81285120, while the sum is 62.

The spelling of 78214266765431 in words is "seventy-eight trillion, two hundred fourteen billion, two hundred sixty-six million, seven hundred sixty-five thousand, four hundred thirty-one".