78392730528736 has 96 divisors (see below), whose sum is σ = 167413653036000. Its totient is φ = 35918764001280.

The previous prime is 78392730528713. The next prime is 78392730528757. The reversal of 78392730528736 is 63782503729387.

It is a super-2 number, since 2×78392730528736² (a number of 29 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 15 ways as a sum of consecutive naturals, for example, 1292278246 + ... + 1292338906.

It is an arithmetic number, because the mean of its divisors is an integer number (1743892219125).

Almost surely, 2^{78392730528736} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78392730528736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83706826518000).

78392730528736 is an abundant number, since it is smaller than the sum of its proper divisors (89020922507264).

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

78392730528736 is a wasteful number, since it uses less digits than its factorization.

78392730528736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83172 (or 83164 counting only the distinct ones).

The product of its (nonzero) digits is 640120320, while the sum is 70.

The spelling of 78392730528736 in words is "seventy-eight trillion, three hundred ninety-two billion, seven hundred thirty million, five hundred twenty-eight thousand, seven hundred thirty-six".