261012160 has 28 divisors (see below), whose sum is σ = 621535968. Its totient is φ = 104404736.

The previous prime is 261012137. The next prime is 261012161. The reversal of 261012160 is 61210162.

It is not an unprimeable number, because it can be changed into a prime (261012161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407512 + ... + 408151.

Almost surely, 2^261012160 is an apocalyptic number.

261012160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261012160 is an abundant number, since it is smaller than the sum of its proper divisors (360523808).

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

261012160 is an equidigital number, since it uses as much as digits as its factorization.

261012160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815680 (or 815670 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 261012160 is about 16155.8707595722. The cubic root of 261012160 is about 639.0775774146.

The spelling of 261012160 in words is "two hundred sixty-one million, twelve thousand, one hundred sixty".