78180587784078 has 32 divisors (see below), whose sum is σ = 174195474112800. Its totient is φ = 23226063213696.

The previous prime is 78180587784043. The next prime is 78180587784121. The reversal of 78180587784078 is 87048778508187.

It is a super-2 number, since 2×78180587784078² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is a junction number, because it is equal to n+sod(n) for n = 78180587783994 and 78180587784012.

It is a congruent 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, 17281294773 + ... + 17281299296.

It is an arithmetic number, because the mean of its divisors is an integer number (5443608566025).

Almost surely, 2^{78180587784078} is an apocalyptic number.

78180587784078 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

78180587784078 is an abundant number, since it is smaller than the sum of its proper divisors (96014886328722).

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

78180587784078 is a wasteful number, since it uses less digits than its factorization.

78180587784078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34562594116.

The product of its (nonzero) digits is 1573519360, while the sum is 78.

The spelling of 78180587784078 in words is "seventy-eight trillion, one hundred eighty billion, five hundred eighty-seven million, seven hundred eighty-four thousand, seventy-eight".