78780087078 has 64 divisors (see below), whose sum is σ = 197133115392. Its totient is φ = 20390021280.

The previous prime is 78780087041. The next prime is 78780087101. The reversal of 78780087078 is 87078008787.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170526 + ... + 432017.

It is an arithmetic number, because the mean of its divisors is an integer number (3080204928).

Almost surely, 2^78780087078 is an apocalyptic number.

78780087078 is an abundant number, since it is smaller than the sum of its proper divisors (118353028314).

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

78780087078 is a wasteful number, since it uses less digits than its factorization.

78780087078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602849.

The product of its (nonzero) digits is 9834496, while the sum is 60.

The spelling of 78780087078 in words is "seventy-eight billion, seven hundred eighty million, eighty-seven thousand, seventy-eight".