78742388733 has 16 divisors (see below), whose sum is σ = 106112223360. Its totient is φ = 51934731264.

The previous prime is 78742388717. The next prime is 78742388741. The reversal of 78742388733 is 33788324787.

It is a happy number.

It is not a de Polignac number, because 78742388733 - 2⁴ = 78742388717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78742388773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195853 + ... + 442541.

It is an arithmetic number, because the mean of its divisors is an integer number (6632013960).

Almost surely, 2^78742388733 is an apocalyptic number.

It is an amenable number.

78742388733 is a deficient number, since it is larger than the sum of its proper divisors (27369834627).

78742388733 is a wasteful number, since it uses less digits than its factorization.

78742388733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247828.

The product of its digits is 37933056, while the sum is 60.

The spelling of 78742388733 in words is "seventy-eight billion, seven hundred forty-two million, three hundred eighty-eight thousand, seven hundred thirty-three".