10169745921 has 12 divisors (see below), whose sum is σ = 14700396672. Its totient is φ = 6774862776.

The previous prime is 10169745907. The next prime is 10169745977. The reversal of 10169745921 is 12954796101.

10169745921 is a `hidden beast` number, since 10 + 169 + 7 + 459 + 21 = 666.

It is not a de Polignac number, because 10169745921 - 2⁶ = 10169745857 is a prime.

It is a super-2 number, since 2×10169745921² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10169745221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401001 + ... + 425606.

It is an arithmetic number, because the mean of its divisors is an integer number (1225033056).

Almost surely, 2^10169745921 is an apocalyptic number.

It is an amenable number.

10169745921 is a deficient number, since it is larger than the sum of its proper divisors (4530650751).

10169745921 is a wasteful number, since it uses less digits than its factorization.

10169745921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827980 (or 827977 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The spelling of 10169745921 in words is "ten billion, one hundred sixty-nine million, seven hundred forty-five thousand, nine hundred twenty-one".