78718817010440 has 64 divisors (see below), whose sum is σ = 178248827190960. Its totient is φ = 31286380769280.

The previous prime is 78718817010409. The next prime is 78718817010469. The reversal of 78718817010440 is 4401071881787.

It can be written as a sum of positive squares in 8 ways, for example, as 3918839915236 + 74799977095204 = 1979606^2 + 8648698^2 .

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, 508307420 + ... + 508462260.

Almost surely, 2^{78718817010440} is an apocalyptic number.

It is an amenable number.

78718817010440 is an abundant number, since it is smaller than the sum of its proper divisors (99530010180520).

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

78718817010440 is a wasteful number, since it uses less digits than its factorization.

78718817010440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235962 (or 235958 counting only the distinct ones).

The product of its (nonzero) digits is 2809856, while the sum is 56.

The spelling of 78718817010440 in words is "seventy-eight trillion, seven hundred eighteen billion, eight hundred seventeen million, ten thousand, four hundred forty".