11251621516 has 12 divisors (see below), whose sum is σ = 19696041288. Its totient is φ = 5624181152.

The previous prime is 11251621361. The next prime is 11251621517. The reversal of 11251621516 is 61512615211.

11251621516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×11251621516³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (11251621517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391801 + ... + 419536.

It is an arithmetic number, because the mean of its divisors is an integer number (1641336774).

Almost surely, 2^11251621516 is an apocalyptic number.

It is an amenable number.

11251621516 is a deficient number, since it is larger than the sum of its proper divisors (8444419772).

11251621516 is a wasteful number, since it uses less digits than its factorization.

11251621516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814808 (or 814806 counting only the distinct ones).

The product of its digits is 3600, while the sum is 31.

The spelling of 11251621516 in words is "eleven billion, two hundred fifty-one million, six hundred twenty-one thousand, five hundred sixteen".