13261616251 has 8 divisors (see below), whose sum is σ = 14284561424. Its totient is φ = 12239074080.

The previous prime is 13261616243. The next prime is 13261616261. The reversal of 13261616251 is 15261616231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13261616251 - 2³ = 13261616243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261616261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30585 + ... + 165706.

It is an arithmetic number, because the mean of its divisors is an integer number (1785570178).

Almost surely, 2^13261616251 is an apocalyptic number.

13261616251 is a deficient number, since it is larger than the sum of its proper divisors (1022945173).

13261616251 is a wasteful number, since it uses less digits than its factorization.

13261616251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201501.

The product of its digits is 12960, while the sum is 34.

The spelling of 13261616251 in words is "thirteen billion, two hundred sixty-one million, six hundred sixteen thousand, two hundred fifty-one".