77855212323 has 24 divisors (see below), whose sum is σ = 128530734176. Its totient is φ = 44485977600.

The previous prime is 77855212321. The next prime is 77855212333. The reversal of 77855212323 is 32321255877.

77855212323 is a `hidden beast` number, since 7 + 7 + 85 + 521 + 23 + 23 = 666.

It is not a de Polignac number, because 77855212323 - 2¹ = 77855212321 is a prime.

It is a super-2 number, since 2×77855212323² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77855212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1490163 + ... + 1541523.

Almost surely, 2^77855212323 is an apocalyptic number.

77855212323 is a deficient number, since it is larger than the sum of its proper divisors (50675521853).

77855212323 is a wasteful number, since it uses less digits than its factorization.

77855212323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75435 (or 75432 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The spelling of 77855212323 in words is "seventy-seven billion, eight hundred fifty-five million, two hundred twelve thousand, three hundred twenty-three".