158281581261 has 16 divisors (see below), whose sum is σ = 211575351680. Its totient is φ = 105254553600.

The previous prime is 158281581257. The next prime is 158281581329. The reversal of 158281581261 is 162185182851.

It is not a de Polignac number, because 158281581261 - 2² = 158281581257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158281581261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158281581061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6310401 + ... + 6335433.

It is an arithmetic number, because the mean of its divisors is an integer number (13223459480).

Almost surely, 2^158281581261 is an apocalyptic number.

It is an amenable number.

158281581261 is a deficient number, since it is larger than the sum of its proper divisors (53293770419).

158281581261 is a wasteful number, since it uses less digits than its factorization.

158281581261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30276.

The product of its digits is 307200, while the sum is 48.

The spelling of 158281581261 in words is "one hundred fifty-eight billion, two hundred eighty-one million, five hundred eighty-one thousand, two hundred sixty-one".