402440747453 has 4 divisors (see below), whose sum is σ = 402638121120. Its totient is φ = 402243373788.

The previous prime is 402440747393. The next prime is 402440747539. The reversal of 402440747453 is 354747044204.

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 402440747453 - 2¹² = 402440743357 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 (402440707453) 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, 98683775 + ... + 98687852.

It is an arithmetic number, because the mean of its divisors is an integer number (100659530280).

Almost surely, 2^402440747453 is an apocalyptic number.

It is an amenable number.

402440747453 is a deficient number, since it is larger than the sum of its proper divisors (197373667).

402440747453 is a wasteful number, since it uses less digits than its factorization.

402440747453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197373666.

The product of its (nonzero) digits is 1505280, while the sum is 44.

The spelling of 402440747453 in words is "four hundred two billion, four hundred forty million, seven hundred forty-seven thousand, four hundred fifty-three".