11542642621 has 4 divisors (see below), whose sum is σ = 12044496672. Its totient is φ = 11040788572.

The previous prime is 11542642619. The next prime is 11542642663. The reversal of 11542642621 is 12624624511.

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 a cyclic number.

It is not a de Polignac number, because 11542642621 - 2¹ = 11542642619 is a prime.

It is a super-2 number, since 2×11542642621² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11542642681) 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, 250926991 + ... + 250927036.

It is an arithmetic number, because the mean of its divisors is an integer number (3011124168).

Almost surely, 2^11542642621 is an apocalyptic number.

It is an amenable number.

11542642621 is a deficient number, since it is larger than the sum of its proper divisors (501854051).

11542642621 is an equidigital number, since it uses as much as digits as its factorization.

11542642621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501854050.

The product of its digits is 23040, while the sum is 34.

The spelling of 11542642621 in words is "eleven billion, five hundred forty-two million, six hundred forty-two thousand, six hundred twenty-one".