6136561266 has 64 divisors (see below), whose sum is σ = 13816365696. Its totient is φ = 1800857600.

The previous prime is 6136561241. The next prime is 6136561273. The reversal of 6136561266 is 6621656316.

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 31 ways as a sum of consecutive naturals, for example, 362446 + ... + 378998.

It is an arithmetic number, because the mean of its divisors is an integer number (215880714).

Almost surely, 2^6136561266 is an apocalyptic number.

6136561266 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6136561266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6908182848).

6136561266 is an abundant number, since it is smaller than the sum of its proper divisors (7679804430).

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

6136561266 is a wasteful number, since it uses less digits than its factorization.

6136561266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16747.

The product of its digits is 233280, while the sum is 42.

The square root of 6136561266 is about 78336.2066097153. The cubic root of 6136561266 is about 1830.8033207572.

The spelling of 6136561266 in words is "six billion, one hundred thirty-six million, five hundred sixty-one thousand, two hundred sixty-six".