7867742645 has 8 divisors (see below), whose sum is σ = 10790047104. Its totient is φ = 5395023504.

The previous prime is 7867742639. The next prime is 7867742669. The reversal of 7867742645 is 5462477687.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7867742645 - 2⁴ = 7867742629 is a prime.

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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112396289 + ... + 112396358.

It is an arithmetic number, because the mean of its divisors is an integer number (1348755888).

Almost surely, 2^7867742645 is an apocalyptic number.

It is an amenable number.

7867742645 is a deficient number, since it is larger than the sum of its proper divisors (2922304459).

7867742645 is a wasteful number, since it uses less digits than its factorization.

7867742645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224792659.

The product of its digits is 15805440, while the sum is 56.

The square root of 7867742645 is about 88700.2967582409. The cubic root of 7867742645 is about 1988.9172535542.

The spelling of 7867742645 in words is "seven billion, eight hundred sixty-seven million, seven hundred forty-two thousand, six hundred forty-five".