78432662631 has 4 divisors (see below), whose sum is σ = 104576883512. Its totient is φ = 52288441752.

The previous prime is 78432662603. The next prime is 78432662639. The reversal of 78432662631 is 13626623487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13626623487 = 3 ⋅4542207829.

It is not a de Polignac number, because 78432662631 - 2¹⁰ = 78432661607 is a prime.

It is a super-2 number, since 2×78432662631² (a number of 23 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 (78432662639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13072110436 + ... + 13072110441.

It is an arithmetic number, because the mean of its divisors is an integer number (26144220878).

Almost surely, 2^78432662631 is an apocalyptic number.

78432662631 is a deficient number, since it is larger than the sum of its proper divisors (26144220881).

78432662631 is a wasteful number, since it uses less digits than its factorization.

78432662631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26144220880.

The product of its digits is 1741824, while the sum is 48.

The spelling of 78432662631 in words is "seventy-eight billion, four hundred thirty-two million, six hundred sixty-two thousand, six hundred thirty-one".