77331781326383 has 4 divisors (see below), whose sum is σ = 77759028737208. Its totient is φ = 76904533915560.

The previous prime is 77331781326379. The next prime is 77331781326427. The reversal of 77331781326383 is 38362318713377.

It is a happy number.

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 77331781326383 - 2² = 77331781326379 is a prime.

It is a super-2 number, since 2×77331781326383² (a number of 29 digits) contains 22 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 (77331781326313) 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, 213623705141 + ... + 213623705502.

It is an arithmetic number, because the mean of its divisors is an integer number (19439757184302).

Almost surely, 2^{77331781326383} is an apocalyptic number.

77331781326383 is a deficient number, since it is larger than the sum of its proper divisors (427247410825).

77331781326383 is a wasteful number, since it uses less digits than its factorization.

77331781326383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427247410824.

The product of its digits is 64012032, while the sum is 62.

The spelling of 77331781326383 in words is "seventy-seven trillion, three hundred thirty-one billion, seven hundred eighty-one million, three hundred twenty-six thousand, three hundred eighty-three".