441624399257 has 4 divisors (see below), whose sum is σ = 444847935156. Its totient is φ = 438400863360.

The previous prime is 441624399247. The next prime is 441624399277. The reversal of 441624399257 is 752993426144.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 285544884496 + 156079514761 = 534364^2 + 395069^2 .

It is a cyclic number.

It is not a de Polignac number, because 441624399257 - 2¹⁸ = 441624137113 is a prime.

It is a super-2 number, since 2×441624399257² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (441624399247) 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, 1611767744 + ... + 1611768017.

It is an arithmetic number, because the mean of its divisors is an integer number (111211983789).

Almost surely, 2^441624399257 is an apocalyptic number.

It is an amenable number.

441624399257 is a deficient number, since it is larger than the sum of its proper divisors (3223535899).

441624399257 is a wasteful number, since it uses less digits than its factorization.

441624399257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223535898.

The product of its digits is 13063680, while the sum is 56.

The spelling of 441624399257 in words is "four hundred forty-one billion, six hundred twenty-four million, three hundred ninety-nine thousand, two hundred fifty-seven".