261421124507733 has 32 divisors (see below), whose sum is σ = 353765395171584. Its totient is φ = 171682918400000.

The previous prime is 261421124507731. The next prime is 261421124507789. The reversal of 261421124507733 is 337705421124162.

261421124507733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 261421124507733 - 2¹ = 261421124507731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261421124507731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3386201533 + ... + 3386278733.

It is an arithmetic number, because the mean of its divisors is an integer number (11055168599112).

Almost surely, 2^{261421124507733} is an apocalyptic number.

It is an amenable number.

261421124507733 is a deficient number, since it is larger than the sum of its proper divisors (92344270663851).

261421124507733 is a wasteful number, since it uses less digits than its factorization.

261421124507733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90317.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 261421124507733 in words is "two hundred sixty-one trillion, four hundred twenty-one billion, one hundred twenty-four million, five hundred seven thousand, seven hundred thirty-three".