1996226991 has 16 divisors (see below), whose sum is σ = 3226225920. Its totient is φ = 1209834360.

The previous prime is 1996226959. The next prime is 1996226993.

1996226991 is a `hidden beast` number, since 1 + 9 + 9 + 622 + 6 + 9 + 9 + 1 = 666.

1996226991 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1996226991 - 2⁵ = 1996226959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1996226993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3360355 + ... + 3360948.

It is an arithmetic number, because the mean of its divisors is an integer number (201639120).

Almost surely, 2^1996226991 is an apocalyptic number.

1996226991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1996226991 is a deficient number, since it is larger than the sum of its proper divisors (1229998929).

1996226991 is a wasteful number, since it uses less digits than its factorization.

1996226991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721323 (or 6721317 counting only the distinct ones).

The product of its digits is 944784, while the sum is 54.

The square root of 1996226991 is about 44679.1561133377. The cubic root of 1996226991 is about 1259.1282689140.

The spelling of 1996226991 in words is "one billion, nine hundred ninety-six million, two hundred twenty-six thousand, nine hundred ninety-one".