405243763125 has 40 divisors (see below), whose sum is σ = 685267819104. Its totient is φ = 212904120000.

The previous prime is 405243763121. The next prime is 405243763139. The reversal of 405243763125 is 521367342504.

It is not a de Polignac number, because 405243763125 - 2² = 405243763121 is a prime.

It is a super-2 number, since 2×405243763125² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405243763121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1487286 + ... + 1738535.

Almost surely, 2^405243763125 is an apocalyptic number.

It is an amenable number.

405243763125 is a deficient number, since it is larger than the sum of its proper divisors (280024055979).

405243763125 is an equidigital number, since it uses as much as digits as its factorization.

405243763125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225911 (or 3225896 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 42.

The spelling of 405243763125 in words is "four hundred five billion, two hundred forty-three million, seven hundred sixty-three thousand, one hundred twenty-five".