77917323672241 has 3 divisors (see below), whose sum is σ = 77917332499321. Its totient is φ = 77917314845162.

The previous prime is 77917323672197. The next prime is 77917323672271. The reversal of 77917323672241 is 14227632371977.

The square root of 77917323672241 is 8827079.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 77917323672241 - 2¹⁹ = 77917323147953 is a prime.

It is a super-2 number, since 2×77917323672241² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77917323672241.

It is not an unprimeable number, because it can be changed into a prime (77917323672271) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4413540 + ... + 13240618.

Almost surely, 2^{77917323672241} is an apocalyptic number.

77917323672241 is the 8827079-th square number.

77917323672241 is the 4413540-th centered octagonal number.

It is an amenable number.

77917323672241 is a deficient number, since it is larger than the sum of its proper divisors (8827080).

77917323672241 is an frugal number, since it uses more digits than its factorization.

77917323672241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17654158 (or 8827079 counting only the distinct ones).

The product of its digits is 37340352, while the sum is 61.

The spelling of 77917323672241 in words is "seventy-seven trillion, nine hundred seventeen billion, three hundred twenty-three million, six hundred seventy-two thousand, two hundred forty-one".