158851583261 has 4 divisors (see below), whose sum is σ = 181544666592. Its totient is φ = 136158499932.

The previous prime is 158851583257. The next prime is 158851583263. The reversal of 158851583261 is 162385158851.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 158851583261 - 2² = 158851583257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158851583263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11346541655 + ... + 11346541668.

It is an arithmetic number, because the mean of its divisors is an integer number (45386166648).

Almost surely, 2^158851583261 is an apocalyptic number.

It is an amenable number.

158851583261 is a deficient number, since it is larger than the sum of its proper divisors (22693083331).

158851583261 is an equidigital number, since it uses as much as digits as its factorization.

158851583261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22693083330.

The product of its digits is 2304000, while the sum is 53.

The spelling of 158851583261 in words is "one hundred fifty-eight billion, eight hundred fifty-one million, five hundred eighty-three thousand, two hundred sixty-one".