16261550017261 has 4 divisors (see below), whose sum is σ = 16294669264224. Its totient is φ = 16228430770300.

The previous prime is 16261550017169. The next prime is 16261550017343. The reversal of 16261550017261 is 16271005516261.

It is a happy number.

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 16261550017261 - 2⁷ = 16261550017133 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 (16261550077261) 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, 16559622745 + ... + 16559623726.

It is an arithmetic number, because the mean of its divisors is an integer number (4073667316056).

Almost surely, 2^{16261550017261} is an apocalyptic number.

It is an amenable number.

16261550017261 is a deficient number, since it is larger than the sum of its proper divisors (33119246963).

16261550017261 is an equidigital number, since it uses as much as digits as its factorization.

16261550017261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33119246962.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 16261550017261 in words is "sixteen trillion, two hundred sixty-one billion, five hundred fifty million, seventeen thousand, two hundred sixty-one".