261405116200 has 48 divisors (see below), whose sum is σ = 616327025760. Its totient is φ = 103089336000.

The previous prime is 261405116191. The next prime is 261405116249. The reversal of 261405116200 is 2611504162.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9190206 + ... + 9218605.

It is an arithmetic number, because the mean of its divisors is an integer number (12840146370).

Almost surely, 2^261405116200 is an apocalyptic number.

261405116200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261405116200 is an abundant number, since it is smaller than the sum of its proper divisors (354921909560).

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

261405116200 is a wasteful number, since it uses less digits than its factorization.

261405116200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18408898 (or 18408889 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 261405116200 in words is "two hundred sixty-one billion, four hundred five million, one hundred sixteen thousand, two hundred".