261154950 has 48 divisors (see below), whose sum is σ = 740190720. Its totient is φ = 59692320.

The previous prime is 261154939. The next prime is 261154951. The reversal of 261154950 is 59451162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261154951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123310 + ... + 125409.

It is an arithmetic number, because the mean of its divisors is an integer number (15420640).

Almost surely, 2^261154950 is an apocalyptic number.

261154950 is an abundant number, since it is smaller than the sum of its proper divisors (479035770).

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

261154950 is a wasteful number, since it uses less digits than its factorization.

261154950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248741 (or 248736 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 261154950 is about 16160.2892919650. The cubic root of 261154950 is about 639.1940946576.

The spelling of 261154950 in words is "two hundred sixty-one million, one hundred fifty-four thousand, nine hundred fifty".