77472802848 has 96 divisors (see below), whose sum is σ = 232811542656. Its totient is φ = 22097645568.

The previous prime is 77472802819. The next prime is 77472802861. The reversal of 77472802848 is 84820827477.

It is a happy number.

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

It is a super-2 number, since 2×77472802848² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301290 + ... + 495702.

It is an arithmetic number, because the mean of its divisors is an integer number (2425120236).

Almost surely, 2^77472802848 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 77472802848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116405771328).

77472802848 is an abundant number, since it is smaller than the sum of its proper divisors (155338739808).

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

77472802848 is a wasteful number, since it uses less digits than its factorization.

77472802848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195026 (or 195018 counting only the distinct ones).

The product of its (nonzero) digits is 11239424, while the sum is 57.

The spelling of 77472802848 in words is "seventy-seven billion, four hundred seventy-two million, eight hundred two thousand, eight hundred forty-eight".