134261261556 has 72 divisors (see below), whose sum is σ = 339992835840. Its totient is φ = 41093729280.

The previous prime is 134261261551. The next prime is 134261261557. The reversal of 134261261556 is 655162162431.

It is a super-2 number, since 2×134261261556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134261261551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147165 + ... + 538683.

It is an arithmetic number, because the mean of its divisors is an integer number (4722122720).

Almost surely, 2^134261261556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 134261261556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169996417920).

134261261556 is an abundant number, since it is smaller than the sum of its proper divisors (205731574284).

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

134261261556 is a wasteful number, since it uses less digits than its factorization.

134261261556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391625 (or 391582 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 134261261556 in words is "one hundred thirty-four billion, two hundred sixty-one million, two hundred sixty-one thousand, five hundred fifty-six".