261024579948 has 48 divisors (see below), whose sum is σ = 664624437120. Its totient is φ = 79074758400.

The previous prime is 261024579943. The next prime is 261024579997. The reversal of 261024579948 is 849975420162.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (261024579943) 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 15 ways as a sum of consecutive naturals, for example, 151668 + ... + 738276.

It is an arithmetic number, because the mean of its divisors is an integer number (13846342440).

Almost surely, 2^261024579948 is an apocalyptic number.

It is an amenable number.

261024579948 is an abundant number, since it is smaller than the sum of its proper divisors (403599857172).

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

261024579948 is a wasteful number, since it uses less digits than its factorization.

261024579948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 589998 (or 589996 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 57.

The spelling of 261024579948 in words is "two hundred sixty-one billion, twenty-four million, five hundred seventy-nine thousand, nine hundred forty-eight".