999769058981 has 32 divisors (see below), whose sum is σ = 1248130114560. Its totient is φ = 778001212800.

The previous prime is 999769058927. The next prime is 999769059007. The reversal of 999769058981 is 189850967999.

It is a happy number.

999769058981 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 999769058981 - 2⁶ = 999769058917 is a prime.

It is a super-2 number, since 2×999769058981² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 999769058896 and 999769058905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999769058881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298704350 + ... + 298707696.

It is an arithmetic number, because the mean of its divisors is an integer number (39004066080).

Almost surely, 2^999769058981 is an apocalyptic number.

It is an amenable number.

999769058981 is a deficient number, since it is larger than the sum of its proper divisors (248361055579).

999769058981 is a wasteful number, since it uses less digits than its factorization.

999769058981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7385.

The product of its (nonzero) digits is 793618560, while the sum is 80.

The spelling of 999769058981 in words is "nine hundred ninety-nine billion, seven hundred sixty-nine million, fifty-eight thousand, nine hundred eighty-one".