12527533621 has 2 divisors, whose sum is σ = 12527533622. Its totient is φ = 12527533620.

The previous prime is 12527533591. The next prime is 12527533673. The reversal of 12527533621 is 12633572521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11038654225 + 1488879396 = 105065^2 + 38586^2 .

It is a cyclic number.

It is not a de Polignac number, because 12527533621 - 2⁵ = 12527533589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12527533691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6263766810 + 6263766811.

It is an arithmetic number, because the mean of its divisors is an integer number (6263766811).

Almost surely, 2^12527533621 is an apocalyptic number.

It is an amenable number.

12527533621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12527533621 is an equidigital number, since it uses as much as digits as its factorization.

12527533621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 37.

The spelling of 12527533621 in words is "twelve billion, five hundred twenty-seven million, five hundred thirty-three thousand, six hundred twenty-one".