921915925983 has 24 divisors (see below), whose sum is σ = 1434159832560. Its totient is φ = 567305821440.

The previous prime is 921915925961. The next prime is 921915926003. The reversal of 921915925983 is 389529519129.

921915925983 is a `hidden beast` number, since 9 + 21 + 9 + 15 + 9 + 2 + 598 + 3 = 666.

It is not a de Polignac number, because 921915925983 - 2¹⁷ = 921915794911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 921915925983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (921915965983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2431303 + ... + 2784791.

It is an arithmetic number, because the mean of its divisors is an integer number (59756659690).

Almost surely, 2^921915925983 is an apocalyptic number.

921915925983 is a deficient number, since it is larger than the sum of its proper divisors (512243906577).

921915925983 is a wasteful number, since it uses less digits than its factorization.

921915925983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375799 (or 375796 counting only the distinct ones).

The product of its digits is 15746400, while the sum is 63.

The spelling of 921915925983 in words is "nine hundred twenty-one billion, nine hundred fifteen million, nine hundred twenty-five thousand, nine hundred eighty-three".