261562098500 has 48 divisors (see below), whose sum is σ = 584536592640. Its totient is φ = 102191695200.

The previous prime is 261562098491. The next prime is 261562098517. The reversal of 261562098500 is 5890265162.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6061340 + ... + 6104339.

It is an arithmetic number, because the mean of its divisors is an integer number (12177845680).

Almost surely, 2^261562098500 is an apocalyptic number.

261562098500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261562098500 is an abundant number, since it is smaller than the sum of its proper divisors (322974494140).

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

261562098500 is a wasteful number, since it uses less digits than its factorization.

261562098500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12165741 (or 12165729 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 261562098500 in words is "two hundred sixty-one billion, five hundred sixty-two million, ninety-eight thousand, five hundred".