78251573568378 has 32 divisors (see below), whose sum is σ = 178864672974336. Its totient is φ = 22357100774448.

The previous prime is 78251573568331. The next prime is 78251573568391. The reversal of 78251573568378 is 87386537515287.

It is a super-2 number, since 2×78251573568378² (a number of 29 digits) contains 22 as substring.

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, 18551676 + ... + 22375607.

It is an arithmetic number, because the mean of its divisors is an integer number (5589521030448).

Almost surely, 2^{78251573568378} is an apocalyptic number.

78251573568378 is an abundant number, since it is smaller than the sum of its proper divisors (100613099405958).

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

78251573568378 is a wasteful number, since it uses less digits than its factorization.

78251573568378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40972818.

The product of its digits is 2370816000, while the sum is 75.

The spelling of 78251573568378 in words is "seventy-eight trillion, two hundred fifty-one billion, five hundred seventy-three million, five hundred sixty-eight thousand, three hundred seventy-eight".