921488888869 has 16 divisors (see below), whose sum is σ = 979737292800. Its totient is φ = 863696427264.

The previous prime is 921488888867. The next prime is 921488888927. The reversal of 921488888869 is 968888884129.

It is not a de Polignac number, because 921488888869 - 2¹ = 921488888867 is a prime.

It is a super-2 number, since 2×921488888869² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921488888867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4319292 + ... + 4527610.

It is an arithmetic number, because the mean of its divisors is an integer number (61233580800).

Almost surely, 2^921488888869 is an apocalyptic number.

It is an amenable number.

921488888869 is a deficient number, since it is larger than the sum of its proper divisors (58248403931).

921488888869 is a wasteful number, since it uses less digits than its factorization.

921488888869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209412.

The product of its digits is 1019215872, while the sum is 79.

The spelling of 921488888869 in words is "nine hundred twenty-one billion, four hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred sixty-nine".