11641510421 has 4 divisors (see below), whose sum is σ = 12147663072. Its totient is φ = 11135357772.

The previous prime is 11641510403. The next prime is 11641510423. The reversal of 11641510421 is 12401514611.

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 11641510421 - 2¹⁸ = 11641248277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11641510423) 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, 253076291 + ... + 253076336.

It is an arithmetic number, because the mean of its divisors is an integer number (3036915768).

Almost surely, 2^11641510421 is an apocalyptic number.

It is an amenable number.

11641510421 is a deficient number, since it is larger than the sum of its proper divisors (506152651).

11641510421 is an equidigital number, since it uses as much as digits as its factorization.

11641510421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506152650.

The product of its (nonzero) digits is 960, while the sum is 26.

The spelling of 11641510421 in words is "eleven billion, six hundred forty-one million, five hundred ten thousand, four hundred twenty-one".