77926314440 has 128 divisors (see below), whose sum is σ = 191922514560. Its totient is φ = 28301543424.

The previous prime is 77926314371. The next prime is 77926314443. The reversal of 77926314440 is 4441362977.

It is not an unprimeable number, because it can be changed into a prime (77926314443) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33201347 + ... + 33203693.

It is an arithmetic number, because the mean of its divisors is an integer number (1499394645).

Almost surely, 2^77926314440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77926314440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95961257280).

77926314440 is an abundant number, since it is smaller than the sum of its proper divisors (113996200120).

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

77926314440 is a wasteful number, since it uses less digits than its factorization.

77926314440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391 (or 3387 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 47.

The spelling of 77926314440 in words is "seventy-seven billion, nine hundred twenty-six million, three hundred fourteen thousand, four hundred forty".