405425613721 has 32 divisors (see below), whose sum is σ = 440460453888. Its totient is φ = 371767968000.

The previous prime is 405425613701. The next prime is 405425613727. The reversal of 405425613721 is 127316524504.

It is not a de Polignac number, because 405425613721 - 2²³ = 405417225113 is a prime.

It is a super-2 number, since 2×405425613721² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (405425613727) 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, 124706346 + ... + 124709596.

It is an arithmetic number, because the mean of its divisors is an integer number (13764389184).

Almost surely, 2^405425613721 is an apocalyptic number.

It is an amenable number.

405425613721 is a deficient number, since it is larger than the sum of its proper divisors (35034840167).

405425613721 is a wasteful number, since it uses less digits than its factorization.

405425613721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 405425613721 in words is "four hundred five billion, four hundred twenty-five million, six hundred thirteen thousand, seven hundred twenty-one".