78770886531840 has 216 divisors, whose sum is σ = 282633102552528. Its totient is φ = 21005569658880.

The previous prime is 78770886531833. The next prime is 78770886531853. The reversal of 78770886531840 is 4813568807787.

It is a happy number.

78770886531840 is a `hidden beast` number, since 7 + 8 + 7 + 7 + 0 + 8 + 8 + 6 + 531 + 84 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126313971 + ... + 126936050.

Almost surely, 2^{78770886531840} is an apocalyptic number.

It is an amenable number.

78770886531840 is an abundant number, since it is smaller than the sum of its proper divisors (203862216020688).

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

78770886531840 is an equidigital number, since it uses as much as digits as its factorization.

78770886531840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253250057 (or 253250031 counting only the distinct ones).

The product of its (nonzero) digits is 505774080, while the sum is 72.

The spelling of 78770886531840 in words is "seventy-eight trillion, seven hundred seventy billion, eight hundred eighty-six million, five hundred thirty-one thousand, eight hundred forty".