4261538556 has 72 divisors (see below), whose sum is σ = 11859447600. Its totient is φ = 1279514880.

The previous prime is 4261538543. The next prime is 4261538569. The reversal of 4261538556 is 6558351624.

4261538556 is a `hidden beast` number, since 4 + 2 + 61 + 5 + 38 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (4261538543) and next prime (4261538569).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 6201 + ... + 92528.

It is an arithmetic number, because the mean of its divisors is an integer number (164714550).

Almost surely, 2^4261538556 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 4261538556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5929723800).

4261538556 is an abundant number, since it is smaller than the sum of its proper divisors (7597909044).

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

4261538556 is a wasteful number, since it uses less digits than its factorization.

4261538556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98859 (or 98854 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 4261538556 is about 65280.4607520505. The cubic root of 4261538556 is about 1621.2704757128.

The spelling of 4261538556 in words is "four billion, two hundred sixty-one million, five hundred thirty-eight thousand, five hundred fifty-six".