78682811023 has 4 divisors (see below), whose sum is σ = 78684946128. Its totient is φ = 78680675920.

The previous prime is 78682810979. The next prime is 78682811027. The reversal of 78682811023 is 32011828687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32011828687 = 7499 ⋅4268813.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78682811023 is a prime.

It is a super-2 number, since 2×78682811023² (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 (78682811027) 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, 1011286 + ... + 1086307.

It is an arithmetic number, because the mean of its divisors is an integer number (19671236532).

Almost surely, 2^78682811023 is an apocalyptic number.

78682811023 is a deficient number, since it is larger than the sum of its proper divisors (2135105).

78682811023 is a wasteful number, since it uses less digits than its factorization.

78682811023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135104.

The product of its (nonzero) digits is 258048, while the sum is 46.

The spelling of 78682811023 in words is "seventy-eight billion, six hundred eighty-two million, eight hundred eleven thousand, twenty-three".