261900006 has 16 divisors (see below), whose sum is σ = 524221248. Its totient is φ = 87229800.

The previous prime is 261899993. The next prime is 261900053. The reversal of 261900006 is 600009162.

It is a super-2 number, since 2×261900006² = 137183226285600072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9160 + ... + 24651.

It is an arithmetic number, because the mean of its divisors is an integer number (32763828).

Almost surely, 2^261900006 is an apocalyptic number.

261900006 is an abundant number, since it is smaller than the sum of its proper divisors (262321242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261900006 is a wasteful number, since it uses less digits than its factorization.

261900006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35107.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 261900006 is about 16183.3249364894. The cubic root of 261900006 is about 639.8013755376.

Adding to 261900006 its reverse (600009162), we get a palindrome (861909168).

The spelling of 261900006 in words is "two hundred sixty-one million, nine hundred thousand, six".