12533505501 has 16 divisors (see below), whose sum is σ = 18397811520. Its totient is φ = 7526373120.

The previous prime is 12533505497. The next prime is 12533505511. The reversal of 12533505501 is 10550533521.

It is not a de Polignac number, because 12533505501 - 2² = 12533505497 is a prime.

It is a super-2 number, since 2×12533505501² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533505511) 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, 1738620 + ... + 1745813.

It is an arithmetic number, because the mean of its divisors is an integer number (1149863220).

Almost surely, 2^12533505501 is an apocalyptic number.

12533505501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12533505501 is a deficient number, since it is larger than the sum of its proper divisors (5864306019).

12533505501 is a wasteful number, since it uses less digits than its factorization.

12533505501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484556.

The product of its (nonzero) digits is 11250, while the sum is 30.

The spelling of 12533505501 in words is "twelve billion, five hundred thirty-three million, five hundred five thousand, five hundred one".