261051116 has 24 divisors (see below), whose sum is σ = 484535520. Its totient is φ = 122638592.

The previous prime is 261051107. The next prime is 261051121. The reversal of 261051116 is 611150162.

It is a junction number, because it is equal to n+sod(n) for n = 261051091 and 261051100.

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 in 7 ways as a sum of consecutive naturals, for example, 41465 + ... + 47343.

It is an arithmetic number, because the mean of its divisors is an integer number (20188980).

Almost surely, 2^261051116 is an apocalyptic number.

It is an amenable number.

261051116 is a deficient number, since it is larger than the sum of its proper divisors (223484404).

261051116 is a wasteful number, since it uses less digits than its factorization.

261051116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6553 (or 6551 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 261051116 is about 16157.0763444381. The cubic root of 261051116 is about 639.1093698895.

The spelling of 261051116 in words is "two hundred sixty-one million, fifty-one thousand, one hundred sixteen".