400350125542 has 4 divisors (see below), whose sum is σ = 600525188316. Its totient is φ = 200175062770.

The previous prime is 400350125537. The next prime is 400350125543. The reversal of 400350125542 is 245521053004.

It is a semiprime because it is the product of two primes.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100087531384 + ... + 100087531387.

It is an arithmetic number, because the mean of its divisors is an integer number (150131297079).

Almost surely, 2^400350125542 is an apocalyptic number.

400350125542 is a deficient number, since it is larger than the sum of its proper divisors (200175062774).

400350125542 is a wasteful number, since it uses less digits than its factorization.

400350125542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200175062773.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 400350125542 its reverse (245521053004), we get a palindrome (645871178546).

The spelling of 400350125542 in words is "four hundred billion, three hundred fifty million, one hundred twenty-five thousand, five hundred forty-two".