77938122275 has 24 divisors (see below), whose sum is σ = 104198903760. Its totient is φ = 57487098240.

The previous prime is 77938122217. The next prime is 77938122313. The reversal of 77938122275 is 57222183977.

It is a Cunningham number, because it is equal to 279174²-1.

It is not a de Polignac number, because 77938122275 - 2⁸ = 77938122019 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139589 + ... + 418761.

It is an arithmetic number, because the mean of its divisors is an integer number (4341620990).

Almost surely, 2^77938122275 is an apocalyptic number.

77938122275 is a deficient number, since it is larger than the sum of its proper divisors (26260781485).

77938122275 is a wasteful number, since it uses less digits than its factorization.

77938122275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280055 (or 280050 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 53.

The spelling of 77938122275 in words is "seventy-seven billion, nine hundred thirty-eight million, one hundred twenty-two thousand, two hundred seventy-five".