77780325558 has 16 divisors (see below), whose sum is σ = 167526855216. Its totient is φ = 23932407840.

The previous prime is 77780325451. The next prime is 77780325559. The reversal of 77780325558 is 85552308777.

It is a super-3 number, since 3×77780325558³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 77780325498 and 77780325507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77780325559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498591753 + ... + 498591908.

It is an arithmetic number, because the mean of its divisors is an integer number (10470428451).

Almost surely, 2^77780325558 is an apocalyptic number.

77780325558 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

77780325558 is an abundant number, since it is smaller than the sum of its proper divisors (89746529658).

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

77780325558 is a wasteful number, since it uses less digits than its factorization.

77780325558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997183679.

The product of its (nonzero) digits is 16464000, while the sum is 57.

The spelling of 77780325558 in words is "seventy-seven billion, seven hundred eighty million, three hundred twenty-five thousand, five hundred fifty-eight".