623425512126221 has 32 divisors (see below), whose sum is σ = 727369820352000. Its totient is φ = 534112683834240.

The previous prime is 623425512126191. The next prime is 623425512126223. The reversal of 623425512126221 is 122621215524326.

It is a de Polignac number, because none of the positive numbers 2^k-623425512126221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623425512126223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7936328681 + ... + 7936407233.

It is an arithmetic number, because the mean of its divisors is an integer number (22730306886000).

Almost surely, 2^{623425512126221} is an apocalyptic number.

It is an amenable number.

623425512126221 is a deficient number, since it is larger than the sum of its proper divisors (103944308225779).

623425512126221 is an equidigital number, since it uses as much as digits as its factorization.

623425512126221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89194 (or 89180 counting only the distinct ones).

The product of its digits is 691200, while the sum is 44.

The spelling of 623425512126221 in words is "six hundred twenty-three trillion, four hundred twenty-five billion, five hundred twelve million, one hundred twenty-six thousand, two hundred twenty-one".