77555080801 has 12 divisors (see below), whose sum is σ = 85287118756. Its totient is φ = 70471019520.

The previous prime is 77555080793. The next prime is 77555080847. The reversal of 77555080801 is 10808055577.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 33782072401 + 43773008400 = 183799^2 + 209220^2 .

It is not a de Polignac number, because 77555080801 - 2³ = 77555080793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77555080861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104005 + ... + 407341.

Almost surely, 2^77555080801 is an apocalyptic number.

It is an amenable number.

77555080801 is a deficient number, since it is larger than the sum of its proper divisors (7732037955).

77555080801 is a wasteful number, since it uses less digits than its factorization.

77555080801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305472 (or 305461 counting only the distinct ones).

The product of its (nonzero) digits is 392000, while the sum is 46.

The spelling of 77555080801 in words is "seventy-seven billion, five hundred fifty-five million, eighty thousand, eight hundred one".