77989999999111 has 8 divisors (see below), whose sum is σ = 79187246138624. Its totient is φ = 76793730809400.

The previous prime is 77989999999061. The next prime is 77989999999151. The reversal of 77989999999111 is 11199999998977.

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 77989999999111 - 2³⁷ = 77852561045639 is a prime.

It is a super-2 number, since 2×77989999999111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77989999998995 and 77989999999013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77989999999151) 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, 244076565 + ... + 244395886.

It is an arithmetic number, because the mean of its divisors is an integer number (9898405767328).

Almost surely, 2^{77989999999111} is an apocalyptic number.

77989999999111 is a deficient number, since it is larger than the sum of its proper divisors (1197246139513).

77989999999111 is a wasteful number, since it uses less digits than its factorization.

77989999999111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488474901.

The product of its digits is 16874314632, while the sum is 97.

The spelling of 77989999999111 in words is "seventy-seven trillion, nine hundred eighty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, one hundred eleven".