16253351261 has 4 divisors (see below), whose sum is σ = 18575258592. Its totient is φ = 13931443932.

The previous prime is 16253351239. The next prime is 16253351267. The reversal of 16253351261 is 16215335261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16215335261 = 31 ⋅523075331.

It is a de Polignac number, because none of the positive numbers 2^k-16253351261 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 (16253351267) 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 3 ways as a sum of consecutive naturals, for example, 1160953655 + ... + 1160953668.

It is an arithmetic number, because the mean of its divisors is an integer number (4643814648).

Almost surely, 2^16253351261 is an apocalyptic number.

It is an amenable number.

16253351261 is a deficient number, since it is larger than the sum of its proper divisors (2321907331).

16253351261 is an equidigital number, since it uses as much as digits as its factorization.

16253351261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321907330.

The product of its digits is 32400, while the sum is 35.

The spelling of 16253351261 in words is "sixteen billion, two hundred fifty-three million, three hundred fifty-one thousand, two hundred sixty-one".