400350125540 has 12 divisors (see below), whose sum is σ = 840735263676. Its totient is φ = 160140050208.

The previous prime is 400350125537. The next prime is 400350125543. The reversal of 400350125540 is 45521053004.

It is an interprime number because it is at equal distance from previous prime (400350125537) and next prime (400350125543).

It can be written as a sum of positive squares in 2 ways, for example, as 53212339684 + 347137785856 = 230678^2 + 589184^2 .

It is not an unprimeable number, because it can be changed into a prime (400350125543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10008753119 + ... + 10008753158.

It is an arithmetic number, because the mean of its divisors is an integer number (70061271973).

Almost surely, 2^400350125540 is an apocalyptic number.

It is an amenable number.

400350125540 is an abundant number, since it is smaller than the sum of its proper divisors (440385138136).

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

400350125540 is a wasteful number, since it uses less digits than its factorization.

400350125540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20017506286 (or 20017506284 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

Adding to 400350125540 its reverse (45521053004), we get a palindrome (445871178544).

The spelling of 400350125540 in words is "four hundred billion, three hundred fifty million, one hundred twenty-five thousand, five hundred forty".