78340778370 has 32 divisors (see below), whose sum is σ = 208908743040. Its totient is φ = 20890874160.

The previous prime is 78340778323. The next prime is 78340778387. The reversal of 78340778370 is 7387704387.

It is a super-2 number, since 2×78340778370² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon 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, 145075246 + ... + 145075785.

It is an arithmetic number, because the mean of its divisors is an integer number (6528398220).

Almost surely, 2^78340778370 is an apocalyptic number.

78340778370 is an abundant number, since it is smaller than the sum of its proper divisors (130567964670).

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

78340778370 is a wasteful number, since it uses less digits than its factorization.

78340778370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290151047 (or 290151041 counting only the distinct ones).

The product of its (nonzero) digits is 5531904, while the sum is 54.

The spelling of 78340778370 in words is "seventy-eight billion, three hundred forty million, seven hundred seventy-eight thousand, three hundred seventy".