11641405251 has 32 divisors (see below), whose sum is σ = 18144000000. Its totient is φ = 6636544320.

The previous prime is 11641405213. The next prime is 11641405261. The reversal of 11641405251 is 15250414611.

It is not a de Polignac number, because 11641405251 - 2⁷ = 11641405123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11641405211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430375 + ... + 456623.

It is an arithmetic number, because the mean of its divisors is an integer number (567000000).

Almost surely, 2^11641405251 is an apocalyptic number.

11641405251 is a deficient number, since it is larger than the sum of its proper divisors (6502594749).

11641405251 is an equidigital number, since it uses as much as digits as its factorization.

11641405251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26704 (or 26690 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 11641405251 its reverse (15250414611), we get a palindrome (26891819862).

The spelling of 11641405251 in words is "eleven billion, six hundred forty-one million, four hundred five thousand, two hundred fifty-one".