78777140736 has 80 divisors (see below), whose sum is σ = 239848291584. Its totient is φ = 22507751424.

The previous prime is 78777140723. The next prime is 78777140737. The reversal of 78777140736 is 63704177787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78777140737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3652620 + ... + 3674123.

Almost surely, 2^78777140736 is an apocalyptic number.

It is an amenable number.

78777140736 is an abundant number, since it is smaller than the sum of its proper divisors (161071150848).

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

78777140736 is an equidigital number, since it uses as much as digits as its factorization.

78777140736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326771 (or 7326755 counting only the distinct ones).

The product of its (nonzero) digits is 9680832, while the sum is 57.

The spelling of 78777140736 in words is "seventy-eight billion, seven hundred seventy-seven million, one hundred forty thousand, seven hundred thirty-six".