77890169329 has 8 divisors (see below), whose sum is σ = 89345815808. Its totient is φ = 66516642720.

The previous prime is 77890169311. The next prime is 77890169393. The reversal of 77890169329 is 92396109877.

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 77890169329 - 2⁵ = 77890169297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77890169309) 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, 20527932 + ... + 20531725.

It is an arithmetic number, because the mean of its divisors is an integer number (11168226976).

Almost surely, 2^77890169329 is an apocalyptic number.

It is an amenable number.

77890169329 is a deficient number, since it is larger than the sum of its proper divisors (11455646479).

77890169329 is a wasteful number, since it uses less digits than its factorization.

77890169329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41059935.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The spelling of 77890169329 in words is "seventy-seven billion, eight hundred ninety million, one hundred sixty-nine thousand, three hundred twenty-nine".