200909109291 has 32 divisors (see below), whose sum is σ = 293251021056. Its totient is φ = 121338624000.

The previous prime is 200909109287. The next prime is 200909109343. The reversal of 200909109291 is 192901909002.

It is not a de Polignac number, because 200909109291 - 2² = 200909109287 is a prime.

It is a super-2 number, since 2×200909109291² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200909109221) 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, 46322275 + ... + 46326611.

It is an arithmetic number, because the mean of its divisors is an integer number (9164094408).

Almost surely, 2^200909109291 is an apocalyptic number.

200909109291 is a deficient number, since it is larger than the sum of its proper divisors (92341911765).

200909109291 is a wasteful number, since it uses less digits than its factorization.

200909109291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923.

The product of its (nonzero) digits is 26244, while the sum is 42.

The spelling of 200909109291 in words is "two hundred billion, nine hundred nine million, one hundred nine thousand, two hundred ninety-one".