77730032780325 has 30 divisors (see below), whose sum is σ = 143982890353874. Its totient is φ = 41456017481760.

The previous prime is 77730032780317. The next prime is 77730032780341. The reversal of 77730032780325 is 52308723003777.

It is a happy number.

77730032780325 is a `hidden beast` number, since 7 + 7 + 7 + 300 + 3 + 2 + 7 + 8 + 0 + 325 = 666.

77730032780325 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 27542910481956 + 50187122298369 = 5248134^2 + 7084287^2 .

It is not a de Polignac number, because 77730032780325 - 2³ = 77730032780317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 19192598662 + ... + 19192602711.

Almost surely, 2^{77730032780325} is an apocalyptic number.

77730032780325 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77730032780325 is a deficient number, since it is larger than the sum of its proper divisors (66252857573549).

77730032780325 is a wasteful number, since it uses less digits than its factorization.

77730032780325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38385201395 (or 38385201381 counting only the distinct ones).

The product of its (nonzero) digits is 10372320, while the sum is 54.

The spelling of 77730032780325 in words is "seventy-seven trillion, seven hundred thirty billion, thirty-two million, seven hundred eighty thousand, three hundred twenty-five".