261041480 has 64 divisors (see below), whose sum is σ = 677600640. Its totient is φ = 88653312.

The previous prime is 261041423. The next prime is 261041533. The reversal of 261041480 is 84140162.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25604 + ... + 34316.

It is an arithmetic number, because the mean of its divisors is an integer number (10587510).

Almost surely, 2^261041480 is an apocalyptic number.

261041480 is a gapful number since it is divisible by the number (20) 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 261041480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338800320).

261041480 is an abundant number, since it is smaller than the sum of its proper divisors (416559160).

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

261041480 is a wasteful number, since it uses less digits than its factorization.

261041480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8838 (or 8834 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 261041480 is about 16156.7781441722. The cubic root of 261041480 is about 639.1015061248.

The spelling of 261041480 in words is "two hundred sixty-one million, forty-one thousand, four hundred eighty".