2191841692090 has 32 divisors (see below), whose sum is σ = 3993282732096. Its totient is φ = 866079486720.

The previous prime is 2191841692057. The next prime is 2191841692091. The reversal of 2191841692090 is 902961481912.

It is not an unprimeable number, because it can be changed into a prime (2191841692091) 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, 7763749 + ... + 8041111.

It is an arithmetic number, because the mean of its divisors is an integer number (124790085378).

Almost surely, 2^{2191841692090} is an apocalyptic number.

2191841692090 is a deficient number, since it is larger than the sum of its proper divisors (1801441040006).

2191841692090 is a wasteful number, since it uses less digits than its factorization.

2191841692090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286974.

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 2191841692090 in words is "two trillion, one hundred ninety-one billion, eight hundred forty-one million, six hundred ninety-two thousand, ninety".