261053064 has 64 divisors (see below), whose sum is σ = 729590400. Its totient is φ = 86484672.

The previous prime is 261053057. The next prime is 261053069. The reversal of 261053064 is 460350162.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (261053069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32454 + ... + 39690.

It is an arithmetic number, because the mean of its divisors is an integer number (11399850).

Almost surely, 2^261053064 is an apocalyptic number.

261053064 is a gapful number since it is divisible by the number (24) 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 261053064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (364795200).

261053064 is an abundant number, since it is smaller than the sum of its proper divisors (468537336).

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

261053064 is a wasteful number, since it uses less digits than its factorization.

261053064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7419 (or 7409 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 261053064 is about 16157.1366275092. The cubic root of 261053064 is about 639.1109595934.

The spelling of 261053064 in words is "two hundred sixty-one million, fifty-three thousand, sixty-four".