78489752770 has 64 divisors (see below), whose sum is σ = 166146785280. Its totient is φ = 26319916800.

The previous prime is 78489752699. The next prime is 78489752797. The reversal of 78489752770 is 7725798487.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1433151 + ... + 1486909.

It is an arithmetic number, because the mean of its divisors is an integer number (2596043520).

Almost surely, 2^78489752770 is an apocalyptic number.

78489752770 is an abundant number, since it is smaller than the sum of its proper divisors (87657032510).

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

78489752770 is a wasteful number, since it uses less digits than its factorization.

78489752770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54811.

The product of its (nonzero) digits is 55319040, while the sum is 64.

The spelling of 78489752770 in words is "seventy-eight billion, four hundred eighty-nine million, seven hundred fifty-two thousand, seven hundred seventy".