400782245125 has 24 divisors (see below), whose sum is σ = 527886896472. Its totient is φ = 303750720000.

The previous prime is 400782245107. The next prime is 400782245197. The reversal of 400782245125 is 521542287004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5816502756 + 394965742369 = 76266^2 + 628463^2 .

It is not a de Polignac number, because 400782245125 - 2⁷ = 400782244997 is a prime.

It is a super-3 number, since 3×400782245125³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4395676 + ... + 4485925.

It is an arithmetic number, because the mean of its divisors is an integer number (21995287353).

Almost surely, 2^400782245125 is an apocalyptic number.

It is an amenable number.

400782245125 is a deficient number, since it is larger than the sum of its proper divisors (127104651347).

400782245125 is an equidigital number, since it uses as much as digits as its factorization.

400782245125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8881654 (or 8881625 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 40.

The spelling of 400782245125 in words is "four hundred billion, seven hundred eighty-two million, two hundred forty-five thousand, one hundred twenty-five".