7860805645 has 24 divisors (see below), whose sum is σ = 11970596448. Its totient is φ = 4900240800.

The previous prime is 7860805613. The next prime is 7860805669. The reversal of 7860805645 is 5465080687.

It is not a de Polignac number, because 7860805645 - 2⁵ = 7860805613 is a prime.

It is a super-3 number, since 3×7860805645³ (a number of 31 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1455711 + ... + 1461100.

It is an arithmetic number, because the mean of its divisors is an integer number (498774852).

Almost surely, 2^7860805645 is an apocalyptic number.

It is an amenable number.

7860805645 is a deficient number, since it is larger than the sum of its proper divisors (4109790803).

7860805645 is a wasteful number, since it uses less digits than its factorization.

7860805645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916841 (or 2916834 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 49.

The square root of 7860805645 is about 88661.1845454368. The cubic root of 7860805645 is about 1988.3325379385.

The spelling of 7860805645 in words is "seven billion, eight hundred sixty million, eight hundred five thousand, six hundred forty-five".