261100445 has 16 divisors (see below), whose sum is σ = 324037632. Its totient is φ = 201761280.

The previous prime is 261100421. The next prime is 261100459. The reversal of 261100445 is 544001162.

261100445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 261100445 - 2¹⁶ = 261034909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261100445.

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, 103064 + ... + 105566.

It is an arithmetic number, because the mean of its divisors is an integer number (20252352).

Almost surely, 2^261100445 is an apocalyptic number.

It is an amenable number.

261100445 is a deficient number, since it is larger than the sum of its proper divisors (62937187).

261100445 is a wasteful number, since it uses less digits than its factorization.

261100445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3212.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 261100445 is about 16158.6028170755. The cubic root of 261100445 is about 639.1496233604.

The spelling of 261100445 in words is "two hundred sixty-one million, one hundred thousand, four hundred forty-five".