261026383 has 8 divisors (see below), whose sum is σ = 267904208. Its totient is φ = 254185344.

The previous prime is 261026371. The next prime is 261026399. The reversal of 261026383 is 383620162.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261026383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261026323) 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, 5485 + ... + 23497.

It is an arithmetic number, because the mean of its divisors is an integer number (33488026).

Almost surely, 2^261026383 is an apocalyptic number.

261026383 is a deficient number, since it is larger than the sum of its proper divisors (6877825).

261026383 is a wasteful number, since it uses less digits than its factorization.

261026383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18393.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 261026383 is about 16156.3109341211. The cubic root of 261026383 is about 639.0891853480.

The spelling of 261026383 in words is "two hundred sixty-one million, twenty-six thousand, three hundred eighty-three".