77923925617 has 16 divisors (see below), whose sum is σ = 82431648000. Its totient is φ = 73457276544.

The previous prime is 77923925603. The next prime is 77923925633. The reversal of 77923925617 is 71652932977.

It is a cyclic number.

It is not a de Polignac number, because 77923925617 - 2⁷ = 77923925489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77923926617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7914984 + ... + 7924822.

It is an arithmetic number, because the mean of its divisors is an integer number (5151978000).

Almost surely, 2^77923925617 is an apocalyptic number.

It is an amenable number.

77923925617 is a deficient number, since it is larger than the sum of its proper divisors (4507722383).

77923925617 is a wasteful number, since it uses less digits than its factorization.

77923925617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11880.

The product of its digits is 10001880, while the sum is 58.

The spelling of 77923925617 in words is "seventy-seven billion, nine hundred twenty-three million, nine hundred twenty-five thousand, six hundred seventeen".