78180574052878 has 24 divisors (see below), whose sum is σ = 129194653507920. Its totient is φ = 35455675490400.

The previous prime is 78180574052813. The next prime is 78180574052881. The reversal of 78180574052878 is 87825047508187.

It is a super-2 number, since 2×78180574052878² (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 11 ways as a sum of consecutive naturals, for example, 367843903 + ... + 368056378.

It is an arithmetic number, because the mean of its divisors is an integer number (5383110562830).

Almost surely, 2^{78180574052878} is an apocalyptic number.

78180574052878 is a deficient number, since it is larger than the sum of its proper divisors (51014079455042).

78180574052878 is a wasteful number, since it uses less digits than its factorization.

78180574052878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735900744 (or 735900733 counting only the distinct ones).

The product of its (nonzero) digits is 280985600, while the sum is 70.

The spelling of 78180574052878 in words is "seventy-eight trillion, one hundred eighty billion, five hundred seventy-four million, fifty-two thousand, eight hundred seventy-eight".