10521700645 has 16 divisors (see below), whose sum is σ = 12939720192. Its totient is φ = 8208423040.

The previous prime is 10521700643. The next prime is 10521700663. The reversal of 10521700645 is 54600712501.

It is not a de Polignac number, because 10521700645 - 2¹ = 10521700643 is a prime.

It is a super-2 number, since 2×10521700645² (a number of 21 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 (10521700643) 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, 511224 + ... + 531406.

It is an arithmetic number, because the mean of its divisors is an integer number (808732512).

Almost surely, 2^10521700645 is an apocalyptic number.

It is an amenable number.

10521700645 is a deficient number, since it is larger than the sum of its proper divisors (2418019547).

10521700645 is a wasteful number, since it uses less digits than its factorization.

10521700645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 10521700645 in words is "ten billion, five hundred twenty-one million, seven hundred thousand, six hundred forty-five".