261928853 has 8 divisors (see below), whose sum is σ = 275827200. Its totient is φ = 248239728.

The previous prime is 261928819. The next prime is 261928903. The reversal of 261928853 is 358829162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261928853 - 2¹⁶ = 261863317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261928253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49733 + ... + 54746.

It is an arithmetic number, because the mean of its divisors is an integer number (34478400).

Almost surely, 2^261928853 is an apocalyptic number.

261928853 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

261928853 is a deficient number, since it is larger than the sum of its proper divisors (13898347).

261928853 is a wasteful number, since it uses less digits than its factorization.

261928853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104611.

The product of its digits is 207360, while the sum is 44.

The square root of 261928853 is about 16184.2161688480. The cubic root of 261928853 is about 639.8248650021.

The spelling of 261928853 in words is "two hundred sixty-one million, nine hundred twenty-eight thousand, eight hundred fifty-three".