77723257216511 has 4 divisors (see below), whose sum is σ = 77723394717024. Its totient is φ = 77723119716000.

The previous prime is 77723257216499. The next prime is 77723257216529. The reversal of 77723257216511 is 11561275232777.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77723257216511 - 2¹⁸ = 77723256954367 is a prime.

It is a super-3 number, since 3×77723257216511³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77723257212511) 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, 67898855 + ... + 69034056.

It is an arithmetic number, because the mean of its divisors is an integer number (19430848679256).

Almost surely, 2^{77723257216511} is an apocalyptic number.

77723257216511 is a deficient number, since it is larger than the sum of its proper divisors (137500513).

77723257216511 is a wasteful number, since it uses less digits than its factorization.

77723257216511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137500512.

The product of its digits is 8643600, while the sum is 56.

The spelling of 77723257216511 in words is "seventy-seven trillion, seven hundred twenty-three billion, two hundred fifty-seven million, two hundred sixteen thousand, five hundred eleven".