400053781325 has 24 divisors (see below), whose sum is σ = 569645965920. Its totient is φ = 275635137600.

The previous prime is 400053781321. The next prime is 400053781331. The reversal of 400053781325 is 523187350004.

It is not a de Polignac number, because 400053781325 - 2² = 400053781321 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400053781321) 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, 38277434 + ... + 38287883.

It is an arithmetic number, because the mean of its divisors is an integer number (23735248580).

Almost surely, 2^400053781325 is an apocalyptic number.

It is an amenable number.

400053781325 is a deficient number, since it is larger than the sum of its proper divisors (169592184595).

400053781325 is a wasteful number, since it uses less digits than its factorization.

400053781325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76565357 (or 76565352 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 400053781325 in words is "four hundred billion, fifty-three million, seven hundred eighty-one thousand, three hundred twenty-five".