261654150 has 24 divisors (see below), whose sum is σ = 648902664. Its totient is φ = 69774400.

The previous prime is 261654131. The next prime is 261654221. The reversal of 261654150 is 51456162.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 872031 + ... + 872330.

It is an arithmetic number, because the mean of its divisors is an integer number (27037611).

Almost surely, 2^261654150 is an apocalyptic number.

261654150 is an abundant number, since it is smaller than the sum of its proper divisors (387248514).

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

261654150 is a wasteful number, since it uses less digits than its factorization.

261654150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1744376 (or 1744371 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 261654150 is about 16175.7271861267. The cubic root of 261654150 is about 639.6011104873.

The spelling of 261654150 in words is "two hundred sixty-one million, six hundred fifty-four thousand, one hundred fifty".