8745377629921 has 4 divisors (see below), whose sum is σ = 8777888327700. Its totient is φ = 8712866932144.

The previous prime is 8745377629889. The next prime is 8745377629991. The reversal of 8745377629921 is 1299267735478.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4443221331025 + 4302156298896 = 2107895^2 + 2074164^2 .

It is a cyclic number.

It is not a de Polignac number, because 8745377629921 - 2⁵ = 8745377629889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8745377629991) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16255348486 + ... + 16255349023.

It is an arithmetic number, because the mean of its divisors is an integer number (2194472081925).

Almost surely, 2^{8745377629921} is an apocalyptic number.

It is an amenable number.

8745377629921 is a deficient number, since it is larger than the sum of its proper divisors (32510697779).

8745377629921 is a wasteful number, since it uses less digits than its factorization.

8745377629921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32510697778.

The product of its digits is 320060160, while the sum is 70.

The spelling of 8745377629921 in words is "eight trillion, seven hundred forty-five billion, three hundred seventy-seven million, six hundred twenty-nine thousand, nine hundred twenty-one".