11588545621 has 2 divisors, whose sum is σ = 11588545622. Its totient is φ = 11588545620.

The previous prime is 11588545583. The next prime is 11588545637. The reversal of 11588545621 is 12654588511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11510929521 + 77616100 = 107289^2 + 8810^2 .

It is a cyclic number.

It is not a de Polignac number, because 11588545621 - 2⁹ = 11588545109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11588545421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5794272810 + 5794272811.

It is an arithmetic number, because the mean of its divisors is an integer number (5794272811).

Almost surely, 2^11588545621 is an apocalyptic number.

It is an amenable number.

11588545621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11588545621 is an equidigital number, since it uses as much as digits as its factorization.

11588545621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384000, while the sum is 46.

The spelling of 11588545621 in words is "eleven billion, five hundred eighty-eight million, five hundred forty-five thousand, six hundred twenty-one".