78374689720 has 32 divisors (see below), whose sum is σ = 178575249600. Its totient is φ = 30953040768.

The previous prime is 78374689691. The next prime is 78374689781. The reversal of 78374689720 is 2798647387.

It is a super-2 number, since 2×78374689720² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12397899 + ... + 12404218.

It is an arithmetic number, because the mean of its divisors is an integer number (5580476550).

Almost surely, 2^78374689720 is an apocalyptic number.

It is an amenable number.

78374689720 is an abundant number, since it is smaller than the sum of its proper divisors (100200559880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78374689720 is a wasteful number, since it uses less digits than its factorization.

78374689720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24802207 (or 24802203 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 78374689720 in words is "seventy-eight billion, three hundred seventy-four million, six hundred eighty-nine thousand, seven hundred twenty".