77800550880 has 96 divisors (see below), whose sum is σ = 263923428384. Its totient is φ = 19150903296.

The previous prime is 77800550879. The next prime is 77800550923. The reversal of 77800550880 is 8805500877.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 6227779 + ... + 6240258.

It is an arithmetic number, because the mean of its divisors is an integer number (2749202379).

Almost surely, 2^77800550880 is an apocalyptic number.

It is an amenable number.

77800550880 is an abundant number, since it is smaller than the sum of its proper divisors (186122877504).

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

77800550880 is a wasteful number, since it uses less digits than its factorization.

77800550880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12468068 (or 12468060 counting only the distinct ones).

The product of its (nonzero) digits is 627200, while the sum is 48.

The spelling of 77800550880 in words is "seventy-seven billion, eight hundred million, five hundred fifty thousand, eight hundred eighty".