209340857263992 has 32 divisors (see below), whose sum is σ = 523757528321280. Its totient is φ = 69726234399840.

The previous prime is 209340857263957. The next prime is 209340857264003. The reversal of 209340857263992 is 299362758043902.

It is a super-2 number, since 2×209340857263992² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3378178048 + ... + 3378240015.

It is an arithmetic number, because the mean of its divisors is an integer number (16367422760040).

Almost surely, 2^{209340857263992} is an apocalyptic number.

It is an amenable number.

209340857263992 is an abundant number, since it is smaller than the sum of its proper divisors (314416671057288).

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

209340857263992 is a wasteful number, since it uses less digits than its factorization.

209340857263992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756419363 (or 6756419359 counting only the distinct ones).

The product of its (nonzero) digits is 352719360, while the sum is 69.

The spelling of 209340857263992 in words is "two hundred nine trillion, three hundred forty billion, eight hundred fifty-seven million, two hundred sixty-three thousand, nine hundred ninety-two".