2172901638743 has 24 divisors (see below), whose sum is σ = 2422340057088. Its totient is φ = 1947298122000.

The previous prime is 2172901638737. The next prime is 2172901638773. The reversal of 2172901638743 is 3478361092712.

It is not a de Polignac number, because 2172901638743 - 2⁴ = 2172901638727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172901638773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133865438 + ... + 133881668.

It is an arithmetic number, because the mean of its divisors is an integer number (100930835712).

Almost surely, 2^{2172901638743} is an apocalyptic number.

2172901638743 is a deficient number, since it is larger than the sum of its proper divisors (249438418345).

2172901638743 is a wasteful number, since it uses less digits than its factorization.

2172901638743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31907 (or 31896 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 2172901638743 in words is "two trillion, one hundred seventy-two billion, nine hundred one million, six hundred thirty-eight thousand, seven hundred forty-three".