40249573421 has 4 divisors (see below), whose sum is σ = 40256544000. Its totient is φ = 40242602844.

The previous prime is 40249573417. The next prime is 40249573451. The reversal of 40249573421 is 12437594204.

40249573421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40249573421 - 2² = 40249573417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40249573411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3476621 + ... + 3488178.

It is an arithmetic number, because the mean of its divisors is an integer number (10064136000).

Almost surely, 2^40249573421 is an apocalyptic number.

It is an amenable number.

40249573421 is a deficient number, since it is larger than the sum of its proper divisors (6970579).

40249573421 is an equidigital number, since it uses as much as digits as its factorization.

40249573421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6970578.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 40249573421 in words is "forty billion, two hundred forty-nine million, five hundred seventy-three thousand, four hundred twenty-one".