840080922381 has 12 divisors (see below), whose sum is σ = 1213463973852. Its totient is φ = 560047600896.

The previous prime is 840080922379. The next prime is 840080922419. The reversal of 840080922381 is 183229080048.

840080922381 is a `hidden beast` number, since 8 + 400 + 8 + 0 + 9 + 2 + 238 + 1 = 666.

840080922381 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 78067154025 + 762013768356 = 279405^2 + 872934^2 .

It is not a de Polignac number, because 840080922381 - 2¹ = 840080922379 is a prime.

It is a super-2 number, since 2×840080922381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840080922371) 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, 394045 + ... + 1354781.

It is an arithmetic number, because the mean of its divisors is an integer number (101121997821).

Almost surely, 2^840080922381 is an apocalyptic number.

It is an amenable number.

840080922381 is a deficient number, since it is larger than the sum of its proper divisors (373383051471).

840080922381 is a wasteful number, since it uses less digits than its factorization.

840080922381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057900 (or 1057897 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 840080922381 in words is "eight hundred forty billion, eighty million, nine hundred twenty-two thousand, three hundred eighty-one".