261263548 has 48 divisors (see below), whose sum is σ = 595836864. Its totient is φ = 97274880.

The previous prime is 261263539. The next prime is 261263551. The reversal of 261263548 is 845362162.

261263548 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 14923 + ... + 27298.

It is an arithmetic number, because the mean of its divisors is an integer number (12413268).

Almost surely, 2^261263548 is an apocalyptic number.

261263548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

261263548 is an abundant number, since it is smaller than the sum of its proper divisors (334573316).

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

261263548 is a wasteful number, since it uses less digits than its factorization.

261263548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42262 (or 42260 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 261263548 is about 16163.6489692148. The cubic root of 261263548 is about 639.2826826532.

The spelling of 261263548 in words is "two hundred sixty-one million, two hundred sixty-three thousand, five hundred forty-eight".