10530821647 has 4 divisors (see below), whose sum is σ = 10775724520. Its totient is φ = 10285918776.

The previous prime is 10530821641. The next prime is 10530821659. The reversal of 10530821647 is 74612803501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10530821647 - 2⁷ = 10530821519 is a prime.

It is a super-2 number, since 2×10530821647² (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 (10530821641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122451372 + ... + 122451457.

It is an arithmetic number, because the mean of its divisors is an integer number (2693931130).

Almost surely, 2^10530821647 is an apocalyptic number.

10530821647 is a deficient number, since it is larger than the sum of its proper divisors (244902873).

10530821647 is an equidigital number, since it uses as much as digits as its factorization.

10530821647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244902872.

The product of its (nonzero) digits is 40320, while the sum is 37.

It can be divided in two parts, 1053082 and 1647, that added together give a square (1054729 = 1027²).

The spelling of 10530821647 in words is "ten billion, five hundred thirty million, eight hundred twenty-one thousand, six hundred forty-seven".