78974357623 has 6 divisors (see below), whose sum is σ = 90257258456. Its totient is φ = 67691669232.

The previous prime is 78974357617. The next prime is 78974357669. The reversal of 78974357623 is 32675347987.

It is a happy number.

It is not a de Polignac number, because 78974357623 - 2¹³ = 78974349431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78974352623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 690411 + ... + 796627.

Almost surely, 2^78974357623 is an apocalyptic number.

78974357623 is a deficient number, since it is larger than the sum of its proper divisors (11282900833).

78974357623 is an frugal number, since it uses more digits than its factorization.

78974357623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212441 (or 106224 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 61.

The spelling of 78974357623 in words is "seventy-eight billion, nine hundred seventy-four million, three hundred fifty-seven thousand, six hundred twenty-three".