401624536644 has 36 divisors (see below), whose sum is σ = 1015436939244. Its totient is φ = 133845918912.

The previous prime is 401624536609. The next prime is 401624536673. The reversal of 401624536644 is 446635426104.

401624536644 is a `hidden beast` number, since 4 + 0 + 1 + 6 + 245 + 366 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 68048983044 + 333575553600 = 260862^2 + 577560^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×401624536644² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401624536644.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1036027 + ... + 1369890.

Almost surely, 2^401624536644 is an apocalyptic number.

It is an amenable number.

401624536644 is an abundant number, since it is smaller than the sum of its proper divisors (613812402600).

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

401624536644 is a wasteful number, since it uses less digits than its factorization.

401624536644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410564 (or 2410559 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 401624536644 in words is "four hundred one billion, six hundred twenty-four million, five hundred thirty-six thousand, six hundred forty-four".