400000027525 has 24 divisors (see below), whose sum is σ = 566882449344. Its totient is φ = 274273507200.

The previous prime is 400000027517. The next prime is 400000027529. The reversal of 400000027525 is 525720000004.

It is not a de Polignac number, because 400000027525 - 2³ = 400000027517 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400000027525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000027529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5802510 + ... + 5871040.

It is an arithmetic number, because the mean of its divisors is an integer number (23620102056).

Almost surely, 2^400000027525 is an apocalyptic number.

It is an amenable number.

400000027525 is a deficient number, since it is larger than the sum of its proper divisors (166882421819).

400000027525 is a wasteful number, since it uses less digits than its factorization.

400000027525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101901 (or 101896 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 25.

Adding to 400000027525 its reverse (525720000004), we get a palindrome (925720027529).

The spelling of 400000027525 in words is "four hundred billion, twenty-seven thousand, five hundred twenty-five".