78213486173536 has 48 divisors (see below), whose sum is σ = 176716663441920. Its totient is φ = 33379814160000.

The previous prime is 78213486173531. The next prime is 78213486173549. The reversal of 78213486173536 is 63537168431287.

It is a super-2 number, since 2×78213486173536² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78213486173531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 730422090 + ... + 730529161.

It is an arithmetic number, because the mean of its divisors is an integer number (3681597155040).

Almost surely, 2^{78213486173536} is an apocalyptic number.

It is an amenable number.

78213486173536 is an abundant number, since it is smaller than the sum of its proper divisors (98503177268384).

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

78213486173536 is a wasteful number, since it uses less digits than its factorization.

78213486173536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460951507 (or 1460951499 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 64.

The spelling of 78213486173536 in words is "seventy-eight trillion, two hundred thirteen billion, four hundred eighty-six million, one hundred seventy-three thousand, five hundred thirty-six".