77645382393 has 16 divisors (see below), whose sum is σ = 108195388416. Its totient is φ = 49436442000.

The previous prime is 77645382383. The next prime is 77645382421. The reversal of 77645382393 is 39328354677.

It is not a de Polignac number, because 77645382393 - 2¹⁰ = 77645381369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77645382383) 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, 824983 + ... + 914268.

It is an arithmetic number, because the mean of its divisors is an integer number (6762211776).

Almost surely, 2^77645382393 is an apocalyptic number.

It is an amenable number.

77645382393 is a deficient number, since it is larger than the sum of its proper divisors (30550006023).

77645382393 is a wasteful number, since it uses less digits than its factorization.

77645382393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1739924.

The product of its digits is 22861440, while the sum is 57.

The spelling of 77645382393 in words is "seventy-seven billion, six hundred forty-five million, three hundred eighty-two thousand, three hundred ninety-three".