10644121533 has 4 divisors (see below), whose sum is σ = 14192162048. Its totient is φ = 7096081020.

The previous prime is 10644121513. The next prime is 10644121541. The reversal of 10644121533 is 33512144601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 10644121533 - 2²¹ = 10642024381 is a prime.

It is a super-2 number, since 2×10644121533² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10644121533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10644121513) 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, 1774020253 + ... + 1774020258.

It is an arithmetic number, because the mean of its divisors is an integer number (3548040512).

Almost surely, 2^10644121533 is an apocalyptic number.

It is an amenable number.

10644121533 is a deficient number, since it is larger than the sum of its proper divisors (3548040515).

10644121533 is an equidigital number, since it uses as much as digits as its factorization.

10644121533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3548040514.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 10644121533 in words is "ten billion, six hundred forty-four million, one hundred twenty-one thousand, five hundred thirty-three".