999977555331111 has 12 divisors (see below), whose sum is σ = 1550985596023992. Its totient is φ = 571415745903408.

The previous prime is 999977555331109. The next prime is 999977555331149. The reversal of 999977555331111 is 111133555779999.

999977555331111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 999977555331111 - 2¹ = 999977555331109 is a prime.

It is a super-2 number, since 2×999977555331111² (a number of 31 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999977555331101) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3401284201660 + ... + 3401284201953.

It is an arithmetic number, because the mean of its divisors is an integer number (129248799668666).

Almost surely, 2^{999977555331111} is an apocalyptic number.

999977555331111 is a deficient number, since it is larger than the sum of its proper divisors (551008040692881).

999977555331111 is a wasteful number, since it uses less digits than its factorization.

999977555331111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6802568403630 (or 6802568403623 counting only the distinct ones).

The product of its digits is 361675125, while the sum is 75.

The spelling of 999977555331111 in words is "nine hundred ninety-nine trillion, nine hundred seventy-seven billion, five hundred fifty-five million, three hundred thirty-one thousand, one hundred eleven".