2193921974825 has 24 divisors (see below), whose sum is σ = 3181405537728. Its totient is φ = 1469417503680.

The previous prime is 2193921974807. The next prime is 2193921974891. The reversal of 2193921974825 is 5284791293912.

It is a de Polignac number, because none of the positive numbers 2^k-2193921974825 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 145768022 + ... + 145783071.

It is an arithmetic number, because the mean of its divisors is an integer number (132558564072).

Almost surely, 2^{2193921974825} is an apocalyptic number.

2193921974825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2193921974825 is a deficient number, since it is larger than the sum of its proper divisors (987483562903).

2193921974825 is a wasteful number, since it uses less digits than its factorization.

2193921974825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291551153 (or 291551148 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 62.

The spelling of 2193921974825 in words is "two trillion, one hundred ninety-three billion, nine hundred twenty-one million, nine hundred seventy-four thousand, eight hundred twenty-five".