202581891087 has 8 divisors (see below), whose sum is σ = 270123045504. Its totient is φ = 135047665368.

The previous prime is 202581891073. The next prime is 202581891097. The reversal of 202581891087 is 780198185202.

202581891087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 202581891087 - 2¹¹ = 202581889039 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202581891097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663563 + ... + 1781180.

It is an arithmetic number, because the mean of its divisors is an integer number (33765380688).

Almost surely, 2^202581891087 is an apocalyptic number.

202581891087 is a deficient number, since it is larger than the sum of its proper divisors (67541154417).

202581891087 is a wasteful number, since it uses less digits than its factorization.

202581891087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464349.

The product of its (nonzero) digits is 645120, while the sum is 51.

The spelling of 202581891087 in words is "two hundred two billion, five hundred eighty-one million, eight hundred ninety-one thousand, eighty-seven".