40401256560225 has 48 divisors (see below), whose sum is σ = 72910046982144. Its totient is φ = 19577501064000.

The previous prime is 40401256560221. The next prime is 40401256560253. The reversal of 40401256560225 is 52206565210404.

It is a happy number.

It is not a de Polignac number, because 40401256560225 - 2² = 40401256560221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40401256560221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12261841 + ... + 15203790.

It is an arithmetic number, because the mean of its divisors is an integer number (1518959312128).

Almost surely, 2^{40401256560225} is an apocalyptic number.

It is an amenable number.

40401256560225 is a deficient number, since it is larger than the sum of its proper divisors (32508790421919).

40401256560225 is a wasteful number, since it uses less digits than its factorization.

40401256560225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27467438 (or 27467433 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 40401256560225 in words is "forty trillion, four hundred one billion, two hundred fifty-six million, five hundred sixty thousand, two hundred twenty-five".