261132424420 has 48 divisors (see below), whose sum is σ = 626784859008. Its totient is φ = 89521539840.

The previous prime is 261132424417. The next prime is 261132424459. The reversal of 261132424420 is 24424231162.

261132424420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 1281775 + ... + 1471465.

It is an arithmetic number, because the mean of its divisors is an integer number (13058017896).

Almost surely, 2^261132424420 is an apocalyptic number.

261132424420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261132424420 is an abundant number, since it is smaller than the sum of its proper divisors (365652434588).

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

261132424420 is a wasteful number, since it uses less digits than its factorization.

261132424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199540 (or 199538 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 261132424420 its reverse (24424231162), we get a palindrome (285556655582).

The spelling of 261132424420 in words is "two hundred sixty-one billion, one hundred thirty-two million, four hundred twenty-four thousand, four hundred twenty".