77649813689329 has 8 divisors (see below), whose sum is σ = 88748188334208. Its totient is φ = 66552825073920.

The previous prime is 77649813689323. The next prime is 77649813689359. The reversal of 77649813689329 is 92398631894677.

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 77649813689329 - 2⁵ = 77649813689297 is a prime.

It is a super-2 number, since 2×77649813689329² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77649813689323) 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, 346387312 + ... + 346611409.

It is an arithmetic number, because the mean of its divisors is an integer number (11093523541776).

Almost surely, 2^{77649813689329} is an apocalyptic number.

It is an amenable number.

77649813689329 is a deficient number, since it is larger than the sum of its proper divisors (11098374644879).

77649813689329 is a wasteful number, since it uses less digits than its factorization.

77649813689329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693014735.

The product of its digits is 5925685248, while the sum is 82.

The spelling of 77649813689329 in words is "seventy-seven trillion, six hundred forty-nine billion, eight hundred thirteen million, six hundred eighty-nine thousand, three hundred twenty-nine".