77108898497 has 4 divisors (see below), whose sum is σ = 78415829040. Its totient is φ = 75801967956.

The previous prime is 77108898491. The next prime is 77108898509. The reversal of 77108898497 is 79489880177.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 77108898497 - 2²⁰ = 77107849921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77108898491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653465183 + ... + 653465300.

It is an arithmetic number, because the mean of its divisors is an integer number (19603957260).

Almost surely, 2^77108898497 is an apocalyptic number.

It is an amenable number.

77108898497 is a deficient number, since it is larger than the sum of its proper divisors (1306930543).

77108898497 is a wasteful number, since it uses less digits than its factorization.

77108898497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306930542.

The product of its (nonzero) digits is 56899584, while the sum is 68.

The spelling of 77108898497 in words is "seventy-seven billion, one hundred eight million, eight hundred ninety-eight thousand, four hundred ninety-seven".