40449398025 has 24 divisors (see below), whose sum is σ = 68431607200. Its totient is φ = 21071312640.

The previous prime is 40449398009. The next prime is 40449398027. The reversal of 40449398025 is 52089394404.

40449398025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40449398025 - 2⁴ = 40449398009 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40449398027) 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, 6268000 + ... + 6274449.

Almost surely, 2^40449398025 is an apocalyptic number.

It is an amenable number.

40449398025 is a deficient number, since it is larger than the sum of its proper divisors (27982209175).

40449398025 is a wasteful number, since it uses less digits than its factorization.

40449398025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12542505 (or 12542500 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 40449398025 in words is "forty billion, four hundred forty-nine million, three hundred ninety-eight thousand, twenty-five".