7440321265 has 16 divisors (see below), whose sum is σ = 9645542928. Its totient is φ = 5477043456.

The previous prime is 7440321241. The next prime is 7440321281. The reversal of 7440321265 is 5621230447.

It can be written as a sum of positive squares in 8 ways, for example, as 1882171456 + 5558149809 = 43384^2 + 74553^2 .

It is a cyclic number.

It is not a de Polignac number, because 7440321265 - 2¹⁹ = 7439796977 is a prime.

It is a super-2 number, since 2×7440321265² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7440321265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159942 + ... + 201151.

It is an arithmetic number, because the mean of its divisors is an integer number (602846433).

Almost surely, 2^7440321265 is an apocalyptic number.

It is an amenable number.

7440321265 is a deficient number, since it is larger than the sum of its proper divisors (2205221663).

7440321265 is a wasteful number, since it uses less digits than its factorization.

7440321265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361428.

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 7440321265 is about 86257.2968797423. The cubic root of 7440321265 is about 1952.2281141054.

The spelling of 7440321265 in words is "seven billion, four hundred forty million, three hundred twenty-one thousand, two hundred sixty-five".