261003562511200 has 36 divisors (see below), whose sum is σ = 637174946982420. Its totient is φ = 104401425004160.

The previous prime is 261003562511191. The next prime is 261003562511203. The reversal of 261003562511200 is 2115265300162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261003562511203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 163127225770 + ... + 163127227369.

It is an arithmetic number, because the mean of its divisors is an integer number (17699304082845).

Almost surely, 2^{261003562511200} is an apocalyptic number.

261003562511200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261003562511200 is an abundant number, since it is smaller than the sum of its proper divisors (376171384471220).

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

261003562511200 is a wasteful number, since it uses less digits than its factorization.

261003562511200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326254453159 (or 326254453146 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 261003562511200 in words is "two hundred sixty-one trillion, three billion, five hundred sixty-two million, five hundred eleven thousand, two hundred".