261870025028443 has 8 divisors (see below), whose sum is σ = 282015199026288. Its totient is φ = 241725040447584.

The previous prime is 261870025028441. The next prime is 261870025028473. The reversal of 261870025028443 is 344820520078162.

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 261870025028443 - 2¹ = 261870025028441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261870025028441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 44476405 + ... + 50018902.

It is an arithmetic number, because the mean of its divisors is an integer number (35251899878286).

Almost surely, 2^{261870025028443} is an apocalyptic number.

261870025028443 is a deficient number, since it is larger than the sum of its proper divisors (20145173997845).

261870025028443 is a wasteful number, since it uses less digits than its factorization.

261870025028443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94708493.

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 261870025028443 in words is "two hundred sixty-one trillion, eight hundred seventy billion, twenty-five million, twenty-eight thousand, four hundred forty-three".