261416654 has 4 divisors (see below), whose sum is σ = 392124984. Its totient is φ = 130708326.

The previous prime is 261416641. The next prime is 261416681. The reversal of 261416654 is 456614162.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 65354162 + ... + 65354165.

It is an arithmetic number, because the mean of its divisors is an integer number (98031246).

Almost surely, 2^261416654 is an apocalyptic number.

261416654 is a deficient number, since it is larger than the sum of its proper divisors (130708330).

261416654 is a wasteful number, since it uses less digits than its factorization.

261416654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130708329.

The product of its digits is 34560, while the sum is 35.

The square root of 261416654 is about 16168.3843967169. The cubic root of 261416654 is about 639.4075360204.

The spelling of 261416654 in words is "two hundred sixty-one million, four hundred sixteen thousand, six hundred fifty-four".