77693923261 has 8 divisors (see below), whose sum is σ = 78147918080. Its totient is φ = 77241239712.

The previous prime is 77693923247. The next prime is 77693923271. The reversal of 77693923261 is 16232939677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77693923261 - 2⁹ = 77693922749 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 (77693923271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208845 + ... + 446098.

It is an arithmetic number, because the mean of its divisors is an integer number (9768489760).

Almost surely, 2^77693923261 is an apocalyptic number.

It is an amenable number.

77693923261 is a deficient number, since it is larger than the sum of its proper divisors (453994819).

77693923261 is a wasteful number, since it uses less digits than its factorization.

77693923261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655635.

The product of its digits is 5143824, while the sum is 55.

The spelling of 77693923261 in words is "seventy-seven billion, six hundred ninety-three million, nine hundred twenty-three thousand, two hundred sixty-one".