72193866653 has 2 divisors, whose sum is σ = 72193866654. Its totient is φ = 72193866652.

The previous prime is 72193866601. The next prime is 72193866739. The reversal of 72193866653 is 35666839127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61319131129 + 10874735524 = 247627^2 + 104282^2 .

It is a cyclic number.

It is not a de Polignac number, because 72193866653 - 2²² = 72189672349 is a prime.

It is a super-2 number, since 2×72193866653² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72193863653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36096933326 + 36096933327.

It is an arithmetic number, because the mean of its divisors is an integer number (36096933327).

Almost surely, 2^72193866653 is an apocalyptic number.

It is an amenable number.

72193866653 is a deficient number, since it is larger than the sum of its proper divisors (1).

72193866653 is an equidigital number, since it uses as much as digits as its factorization.

72193866653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 56.

The spelling of 72193866653 in words is "seventy-two billion, one hundred ninety-three million, eight hundred sixty-six thousand, six hundred fifty-three".