11621127493 has 4 divisors (see below), whose sum is σ = 11621812140. Its totient is φ = 11620442848.

The previous prime is 11621127487. The next prime is 11621127509. The reversal of 11621127493 is 39472112611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39472112611 = 3323 ⋅11878457.

It can be written as a sum of positive squares in 2 ways, for example, as 10523066724 + 1098060769 = 102582^2 + 33137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11621127493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621127403) 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, 316198 + ... + 351031.

It is an arithmetic number, because the mean of its divisors is an integer number (2905453035).

Almost surely, 2^11621127493 is an apocalyptic number.

It is an amenable number.

11621127493 is a deficient number, since it is larger than the sum of its proper divisors (684647).

11621127493 is an equidigital number, since it uses as much as digits as its factorization.

11621127493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684646.

The product of its digits is 18144, while the sum is 37.

The spelling of 11621127493 in words is "eleven billion, six hundred twenty-one million, one hundred twenty-seven thousand, four hundred ninety-three".