400541544552025 has 24 divisors (see below), whose sum is σ = 500199525176480. Its totient is φ = 318163449277440.

The previous prime is 400541544551987. The next prime is 400541544552077. The reversal of 400541544552025 is 520255445145004.

It is a de Polignac number, because none of the positive numbers 2^k-400541544552025 is a prime.

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, 76839615 + ... + 81886564.

Almost surely, 2^{400541544552025} is an apocalyptic number.

It is an amenable number.

400541544552025 is a deficient number, since it is larger than the sum of its proper divisors (99657980624455).

400541544552025 is a wasteful number, since it uses less digits than its factorization.

400541544552025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158726905 (or 158726900 counting only the distinct ones).

The product of its (nonzero) digits is 3200000, while the sum is 46.

Adding to 400541544552025 its reverse (520255445145004), we get a palindrome (920796989697029).

The spelling of 400541544552025 in words is "four hundred trillion, five hundred forty-one billion, five hundred forty-four million, five hundred fifty-two thousand, twenty-five".