840899793105 has 12 divisors (see below), whose sum is σ = 1457559641460. Its totient is φ = 448479889632.

The previous prime is 840899793101. The next prime is 840899793113. The reversal of 840899793105 is 501397998048.

It can be written as a sum of positive squares in 2 ways, for example, as 480294739089 + 360605054016 = 693033^2 + 600504^2 .

It is not a de Polignac number, because 840899793105 - 2² = 840899793101 is a prime.

It is a super-2 number, since 2×840899793105² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (840899793101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9343330990 + ... + 9343331079.

It is an arithmetic number, because the mean of its divisors is an integer number (121463303455).

Almost surely, 2^840899793105 is an apocalyptic number.

It is an amenable number.

840899793105 is a deficient number, since it is larger than the sum of its proper divisors (616659848355).

840899793105 is a wasteful number, since it uses less digits than its factorization.

840899793105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18686662080 (or 18686662077 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 840899793105 in words is "eight hundred forty billion, eight hundred ninety-nine million, seven hundred ninety-three thousand, one hundred five".