261652048200138 has 8 divisors (see below), whose sum is σ = 523304096400288. Its totient is φ = 87217349400044.

The previous prime is 261652048200131. The next prime is 261652048200139. The reversal of 261652048200138 is 831002840256162.

It is a sphenic number, since it is the product of 3 distinct primes.

261652048200138 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (261652048200131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21804337350006 + ... + 21804337350017.

It is an arithmetic number, because the mean of its divisors is an integer number (65413012050036).

Almost surely, 2^{261652048200138} is an apocalyptic number.

261652048200138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

261652048200138 is a wasteful number, since it uses less digits than its factorization.

261652048200138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43608674700028.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 261652048200138 in words is "two hundred sixty-one trillion, six hundred fifty-two billion, forty-eight million, two hundred thousand, one hundred thirty-eight".