2172365957896 has 16 divisors (see below), whose sum is σ = 4081188509100. Its totient is φ = 1084049022144.

The previous prime is 2172365957887. The next prime is 2172365957899. The reversal of 2172365957896 is 6987595632712.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2166106932900 + 6259024996 = 1471770^2 + 79114^2 .

It is not an unprimeable number, because it can be changed into a prime (2172365957899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266740275 + ... + 266748418.

Almost surely, 2^{2172365957896} is an apocalyptic number.

It is an amenable number.

2172365957896 is a deficient number, since it is larger than the sum of its proper divisors (1908822551204).

2172365957896 is a wasteful number, since it uses less digits than its factorization.

2172365957896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533489208 (or 533489204 counting only the distinct ones).

The product of its digits is 342921600, while the sum is 70.

The spelling of 2172365957896 in words is "two trillion, one hundred seventy-two billion, three hundred sixty-five million, nine hundred fifty-seven thousand, eight hundred ninety-six".