13261451665206 has 32 divisors (see below), whose sum is σ = 27981025776000. Its totient is φ = 4178499816960.

The previous prime is 13261451665177. The next prime is 13261451665247. The reversal of 13261451665206 is 60256615416231.

It is a happy number.

It is a super-2 number, since 2×13261451665206² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129490600 + ... + 129592971.

It is an arithmetic number, because the mean of its divisors is an integer number (874407055500).

Almost surely, 2^{13261451665206} is an apocalyptic number.

13261451665206 is an abundant number, since it is smaller than the sum of its proper divisors (14719574110794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13261451665206 is a wasteful number, since it uses less digits than its factorization.

13261451665206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259084044.

The product of its (nonzero) digits is 1555200, while the sum is 48.

The spelling of 13261451665206 in words is "thirteen trillion, two hundred sixty-one billion, four hundred fifty-one million, six hundred sixty-five thousand, two hundred six".