77799270901 has 24 divisors (see below), whose sum is σ = 86744829080. Its totient is φ = 69710699520.

The previous prime is 77799270893. The next prime is 77799270979. The reversal of 77799270901 is 10907299777.

It can be written as a sum of positive squares in 4 ways, for example, as 2982798225 + 74816472676 = 54615^2 + 273526^2 .

It is not a de Polignac number, because 77799270901 - 2³ = 77799270893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77799273901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25022335 + ... + 25025443.

Almost surely, 2^77799270901 is an apocalyptic number.

It is an amenable number.

77799270901 is a deficient number, since it is larger than the sum of its proper divisors (8945558179).

77799270901 is a wasteful number, since it uses less digits than its factorization.

77799270901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6037 (or 6026 counting only the distinct ones).

The product of its (nonzero) digits is 3500658, while the sum is 58.

The spelling of 77799270901 in words is "seventy-seven billion, seven hundred ninety-nine million, two hundred seventy thousand, nine hundred one".