405572252644 has 36 divisors (see below), whose sum is σ = 811954168564. Its totient is φ = 176176175616.

The previous prime is 405572252641. The next prime is 405572252647. The reversal of 405572252644 is 446252275504.

It is an interprime number because it is at equal distance from previous prime (405572252641) and next prime (405572252647).

It can be written as a sum of positive squares in 6 ways, for example, as 1188180900 + 404384071744 = 34470^2 + 635912^2 .

It is a super-2 number, since 2×405572252644² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 405572252594 and 405572252603.

It is not an unprimeable number, because it can be changed into a prime (405572252641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13478859 + ... + 13508914.

Almost surely, 2^405572252644 is an apocalyptic number.

It is an amenable number.

405572252644 is an abundant number, since it is smaller than the sum of its proper divisors (406381915920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405572252644 is a wasteful number, since it uses less digits than its factorization.

405572252644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26987824 (or 26987805 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 46.

The spelling of 405572252644 in words is "four hundred five billion, five hundred seventy-two million, two hundred fifty-two thousand, six hundred forty-four".