400559725645 has 16 divisors (see below), whose sum is σ = 481819195008. Its totient is φ = 319683672000.

The previous prime is 400559725639. The next prime is 400559725673. The reversal of 400559725645 is 546527955004.

It is a happy number.

It is not a de Polignac number, because 400559725645 - 2⁵ = 400559725613 is a prime.

It is a super-3 number, since 3×400559725645³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400559725592 and 400559725601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3528520 + ... + 3640270.

It is an arithmetic number, because the mean of its divisors is an integer number (30113699688).

Almost surely, 2^400559725645 is an apocalyptic number.

It is an amenable number.

400559725645 is a deficient number, since it is larger than the sum of its proper divisors (81259469363).

400559725645 is a wasteful number, since it uses less digits than its factorization.

400559725645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113460.

The product of its (nonzero) digits is 7560000, while the sum is 52.

The spelling of 400559725645 in words is "four hundred billion, five hundred fifty-nine million, seven hundred twenty-five thousand, six hundred forty-five".