77128617390 has 96 divisors (see below), whose sum is σ = 208429568928. Its totient is φ = 18241766400.

The previous prime is 77128617341. The next prime is 77128617439. The reversal of 77128617390 is 9371682177.

It is an interprime number because it is at equal distance from previous prime (77128617341) and next prime (77128617439).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110287 + ... + 407946.

It is an arithmetic number, because the mean of its divisors is an integer number (2171141343).

Almost surely, 2^77128617390 is an apocalyptic number.

77128617390 is an abundant number, since it is smaller than the sum of its proper divisors (131300951538).

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

77128617390 is a wasteful number, since it uses less digits than its factorization.

77128617390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518306 (or 518295 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 51.

The spelling of 77128617390 in words is "seventy-seven billion, one hundred twenty-eight million, six hundred seventeen thousand, three hundred ninety".