10643440260465 has 24 divisors (see below), whose sum is σ = 18449623790208. Its totient is φ = 5676195624480.

The previous prime is 10643440260457. The next prime is 10643440260493. The reversal of 10643440260465 is 56406204434601.

10643440260465 is a `hidden beast` number, since 1 + 0 + 6 + 4 + 34 + 4 + 0 + 2 + 604 + 6 + 5 = 666.

It is not a de Polignac number, because 10643440260465 - 2³ = 10643440260457 is a prime.

It is a super-2 number, since 2×10643440260465² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 10643440260465.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5526121 + ... + 7198950.

It is an arithmetic number, because the mean of its divisors is an integer number (768734324592).

Almost surely, 2^{10643440260465} is an apocalyptic number.

10643440260465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10643440260465 is a deficient number, since it is larger than the sum of its proper divisors (7806183529743).

10643440260465 is a wasteful number, since it uses less digits than its factorization.

10643440260465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12743669 (or 12743666 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 45.

The spelling of 10643440260465 in words is "ten trillion, six hundred forty-three billion, four hundred forty million, two hundred sixty thousand, four hundred sixty-five".