77399551776 has 48 divisors (see below), whose sum is σ = 203274568224. Its totient is φ = 25787057664.

The previous prime is 77399551741. The next prime is 77399551807. The reversal of 77399551776 is 67715599377.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4285 + ... + 393468.

It is an arithmetic number, because the mean of its divisors is an integer number (4234886838).

Almost surely, 2^77399551776 is an apocalyptic number.

It is an amenable number.

77399551776 is an abundant number, since it is smaller than the sum of its proper divisors (125875016448).

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

77399551776 is a wasteful number, since it uses less digits than its factorization.

77399551776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399793 (or 399785 counting only the distinct ones).

The product of its digits is 87516450, while the sum is 66.

The spelling of 77399551776 in words is "seventy-seven billion, three hundred ninety-nine million, five hundred fifty-one thousand, seven hundred seventy-six".