78372889749 has 96 divisors (see below), whose sum is σ = 144605260800. Its totient is φ = 39715764480.

The previous prime is 78372889739. The next prime is 78372889753. The reversal of 78372889749 is 94798827387.

It is not a de Polignac number, because 78372889749 - 2⁸ = 78372889493 is a prime.

It is a super-2 number, since 2×78372889749² (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 (78372889739) 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 95 ways as a sum of consecutive naturals, for example, 37515897 + ... + 37517985.

It is an arithmetic number, because the mean of its divisors is an integer number (1506304800).

Almost surely, 2^78372889749 is an apocalyptic number.

It is an amenable number.

78372889749 is a deficient number, since it is larger than the sum of its proper divisors (66232371051).

78372889749 is a wasteful number, since it uses less digits than its factorization.

78372889749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415 (or 3412 counting only the distinct ones).

The product of its digits is 341397504, while the sum is 72.

The spelling of 78372889749 in words is "seventy-eight billion, three hundred seventy-two million, eight hundred eighty-nine thousand, seven hundred forty-nine".