77198017738480 has 80 divisors (see below), whose sum is σ = 180473251651200. Its totient is φ = 30709592238080.

The previous prime is 77198017738453. The next prime is 77198017738529. The reversal of 77198017738480 is 8483771089177.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a hoax number, since the sum of its digits (70) coincides with the sum of the digits of its distinct prime factors.

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, 11897526 + ... + 17203114.

It is an arithmetic number, because the mean of its divisors is an integer number (2255915645640).

Almost surely, 2^{77198017738480} is an apocalyptic number.

It is an amenable number.

77198017738480 is an abundant number, since it is smaller than the sum of its proper divisors (103275233912720).

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

77198017738480 is a wasteful number, since it uses less digits than its factorization.

77198017738480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5306602 (or 5306596 counting only the distinct ones).

The product of its (nonzero) digits is 132765696, while the sum is 70.

The spelling of 77198017738480 in words is "seventy-seven trillion, one hundred ninety-eight billion, seventeen million, seven hundred thirty-eight thousand, four hundred eighty".