78228076091840 has 56 divisors (see below), whose sum is σ = 186287538556512. Its totient is φ = 31290065945600.

The previous prime is 78228076091819. The next prime is 78228076091917. The reversal of 78228076091840 is 4819067082287.

It is a super-2 number, since 2×78228076091840² (a number of 29 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

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, 4089002 + ... + 13159638.

Almost surely, 2^{78228076091840} is an apocalyptic number.

It is an amenable number.

78228076091840 is an abundant number, since it is smaller than the sum of its proper divisors (108059462464672).

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

78228076091840 is a wasteful number, since it uses less digits than its factorization.

78228076091840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9097605 (or 9097595 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 62.

The spelling of 78228076091840 in words is "seventy-eight trillion, two hundred twenty-eight billion, seventy-six million, ninety-one thousand, eight hundred forty".