1922991226506 has 96 divisors (see below), whose sum is σ = 4947757476480. Its totient is φ = 548346148416.

The previous prime is 1922991226451. The next prime is 1922991226553. The reversal of 1922991226506 is 6056221992291.

1922991226506 is a `hidden beast` number, since 1 + 9 + 2 + 2 + 9 + 9 + 122 + 6 + 506 = 666.

It is a super-3 number, since 3×1922991226506³ (a number of 38 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1176360 + ... + 2286876.

It is an arithmetic number, because the mean of its divisors is an integer number (51539140380).

Almost surely, 2^{1922991226506} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1922991226506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2473878738240).

1922991226506 is an abundant number, since it is smaller than the sum of its proper divisors (3024766249974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1922991226506 is a wasteful number, since it uses less digits than its factorization.

1922991226506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111050 (or 1111038 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 1922991226506 in words is "one trillion, nine hundred twenty-two billion, nine hundred ninety-one million, two hundred twenty-six thousand, five hundred six".