921523641842 has 8 divisors (see below), whose sum is σ = 1394966981100. Its totient is φ = 456534648144.

The previous prime is 921523641839. The next prime is 921523641851. The reversal of 921523641842 is 248146325129.

It can be written as a sum of positive squares in 2 ways, for example, as 921256352041 + 267289801 = 959821^2 + 16349^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2113586117 + ... + 2113586552.

Almost surely, 2^921523641842 is an apocalyptic number.

921523641842 is a deficient number, since it is larger than the sum of its proper divisors (473443339258).

921523641842 is a wasteful number, since it uses less digits than its factorization.

921523641842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227172780.

The product of its digits is 829440, while the sum is 47.

The spelling of 921523641842 in words is "nine hundred twenty-one billion, five hundred twenty-three million, six hundred forty-one thousand, eight hundred forty-two".