78106366773 has 40 divisors (see below), whose sum is σ = 118231132800. Its totient is φ = 51378380352.

The previous prime is 78106366769. The next prime is 78106366799. The reversal of 78106366773 is 37766360187.

It is a happy number.

It is not a de Polignac number, because 78106366773 - 2² = 78106366769 is a prime.

It is a super-2 number, since 2×78106366773² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78106366753) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13364590 + ... + 13370432.

It is an arithmetic number, because the mean of its divisors is an integer number (2955778320).

Almost surely, 2^78106366773 is an apocalyptic number.

It is an amenable number.

78106366773 is a deficient number, since it is larger than the sum of its proper divisors (40124766027).

78106366773 is a wasteful number, since it uses less digits than its factorization.

78106366773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023 (or 8014 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 54.

The spelling of 78106366773 in words is "seventy-eight billion, one hundred six million, three hundred sixty-six thousand, seven hundred seventy-three".