61091268 has 96 divisors (see below), whose sum is σ = 174182400. Its totient is φ = 16267776.

The previous prime is 61091263. The next prime is 61091281. The reversal of 61091268 is 86219016.

It is not an unprimeable number, because it can be changed into a prime (61091263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255493 + ... + 255731.

It is an arithmetic number, because the mean of its divisors is an integer number (1814400).

Almost surely, 2^61091268 is an apocalyptic number.

61091268 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61091268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87091200).

61091268 is an abundant number, since it is smaller than the sum of its proper divisors (113091132).

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

61091268 is a wasteful number, since it uses less digits than its factorization.

61091268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 61091268 is about 7816.0903270113. The cubic root of 61091268 is about 393.8459462835.

The spelling of 61091268 in words is "sixty-one million, ninety-one thousand, two hundred sixty-eight".