1640610024769 has 3 divisors (see below), whose sum is σ = 1640611305633. Its totient is φ = 1640608743906.

The previous prime is 1640610024751. The next prime is 1640610024827. The reversal of 1640610024769 is 9674200160461.

The square root of 1640610024769 is 1280863.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1640610024769 - 2²⁷ = 1640475807041 is a prime.

It is a super-2 number, since 2×1640610024769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640610024709) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 640432 + ... + 1921294.

It is an arithmetic number, because the mean of its divisors is an integer number (546870435211).

Almost surely, 2^{1640610024769} is an apocalyptic number.

1640610024769 is the 1280863-rd square number.

1640610024769 is the 640432-nd centered octagonal number.

It is an amenable number.

1640610024769 is a deficient number, since it is larger than the sum of its proper divisors (1280864).

1640610024769 is an frugal number, since it uses more digits than its factorization.

1640610024769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2561726 (or 1280863 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 1640610024769 in words is "one trillion, six hundred forty billion, six hundred ten million, twenty-four thousand, seven hundred sixty-nine".