11421506519 has 16 divisors (see below), whose sum is σ = 12052177920. Its totient is φ = 10812940320.

The previous prime is 11421506501. The next prime is 11421506573. The reversal of 11421506519 is 91560512411.

It is not a de Polignac number, because 11421506519 - 2⁸ = 11421506263 is a prime.

It is a super-2 number, since 2×11421506519² (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 (11421506599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144572 + ... + 209150.

It is an arithmetic number, because the mean of its divisors is an integer number (753261120).

Almost surely, 2^11421506519 is an apocalyptic number.

11421506519 is a deficient number, since it is larger than the sum of its proper divisors (630671401).

11421506519 is an equidigital number, since it uses as much as digits as its factorization.

11421506519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64750.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 11421506519 in words is "eleven billion, four hundred twenty-one million, five hundred six thousand, five hundred nineteen".