261534370133300 has 36 divisors (see below), whose sum is σ = 619123181663616. Its totient is φ = 95103407320800.

The previous prime is 261534370133237. The next prime is 261534370133327. The reversal of 261534370133300 is 3331073435162.

It is a super-2 number, since 2×261534370133300² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118879258052 + ... + 118879260251.

Almost surely, 2^{261534370133300} is an apocalyptic number.

261534370133300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

261534370133300 is an abundant number, since it is smaller than the sum of its proper divisors (357588811530316).

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

261534370133300 is a wasteful number, since it uses less digits than its factorization.

261534370133300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237758518328 (or 237758518321 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 41.

The spelling of 261534370133300 in words is "two hundred sixty-one trillion, five hundred thirty-four billion, three hundred seventy million, one hundred thirty-three thousand, three hundred".