78632023687 has 4 divisors (see below), whose sum is σ = 89865169936. Its totient is φ = 67398877440.

The previous prime is 78632023681. The next prime is 78632023733.

78632023687 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 78632023687 - 2¹⁵ = 78631990919 is a prime.

It is a super-2 number, since 2×78632023687² (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 (78632023681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5616573114 + ... + 5616573127.

It is an arithmetic number, because the mean of its divisors is an integer number (22466292484).

Almost surely, 2^78632023687 is an apocalyptic number.

78632023687 is a deficient number, since it is larger than the sum of its proper divisors (11233146249).

78632023687 is a wasteful number, since it uses less digits than its factorization.

78632023687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11233146248.

The product of its (nonzero) digits is 4064256, while the sum is 52.

The spelling of 78632023687 in words is "seventy-eight billion, six hundred thirty-two million, twenty-three thousand, six hundred eighty-seven".