261124069420 has 24 divisors (see below), whose sum is σ = 553684438944. Its totient is φ = 103435552896.

The previous prime is 261124069399. The next prime is 261124069421. The reversal of 261124069420 is 24960421162.

It is a self number, because there is not a number n which added to its sum of digits gives 261124069420.

It is not an unprimeable number, because it can be changed into a prime (261124069421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63377569 + ... + 63381688.

It is an arithmetic number, because the mean of its divisors is an integer number (23070184956).

Almost surely, 2^261124069420 is an apocalyptic number.

261124069420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261124069420 is an abundant number, since it is smaller than the sum of its proper divisors (292560369524).

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

261124069420 is a wasteful number, since it uses less digits than its factorization.

261124069420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126759369 (or 126759367 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 261124069420 in words is "two hundred sixty-one billion, one hundred twenty-four million, sixty-nine thousand, four hundred twenty".