261488710101 has 8 divisors (see below), whose sum is σ = 348664770144. Its totient is φ = 174319228400.

The previous prime is 261488710081. The next prime is 261488710139. The reversal of 261488710101 is 101017884162.

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

It is a cyclic number.

It is not a de Polignac number, because 261488710101 - 2⁶ = 261488710037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261488710101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261488710201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551075 + ... + 1711376.

It is an arithmetic number, because the mean of its divisors is an integer number (43583096268).

Almost surely, 2^261488710101 is an apocalyptic number.

It is an amenable number.

261488710101 is a deficient number, since it is larger than the sum of its proper divisors (87176060043).

261488710101 is a wasteful number, since it uses less digits than its factorization.

261488710101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289171.

The product of its (nonzero) digits is 21504, while the sum is 39.

The spelling of 261488710101 in words is "two hundred sixty-one billion, four hundred eighty-eight million, seven hundred ten thousand, one hundred one".