13572266749 has 4 divisors (see below), whose sum is σ = 13589825436. Its totient is φ = 13554708064.

The previous prime is 13572266717. The next prime is 13572266783. The reversal of 13572266749 is 94766227531.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 281635524 + 13290631225 = 16782^2 + 115285^2 .

It is a cyclic number.

It is not a de Polignac number, because 13572266749 - 2⁵ = 13572266717 is a prime.

It is a super-2 number, since 2×13572266749² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13572266696 and 13572266705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13572260749) 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, 8778184 + ... + 8779729.

It is an arithmetic number, because the mean of its divisors is an integer number (3397456359).

Almost surely, 2^13572266749 is an apocalyptic number.

It is an amenable number.

13572266749 is a deficient number, since it is larger than the sum of its proper divisors (17558687).

13572266749 is an equidigital number, since it uses as much as digits as its factorization.

13572266749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17558686.

The product of its digits is 3810240, while the sum is 52.

The spelling of 13572266749 in words is "thirteen billion, five hundred seventy-two million, two hundred sixty-six thousand, seven hundred forty-nine".