155891256859 has 16 divisors (see below), whose sum is σ = 177796829952. Its totient is φ = 135588724128.

The previous prime is 155891256809. The next prime is 155891256883. The reversal of 155891256859 is 958652198551.

It is not a de Polignac number, because 155891256859 - 2¹¹ = 155891254811 is a prime.

It is a super-3 number, since 3×155891256859³ (a number of 35 digits) contains 333 as substring.

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 155891256859.

It is not an unprimeable number, because it can be changed into a prime (155891256809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3870829 + ... + 3910894.

It is an arithmetic number, because the mean of its divisors is an integer number (11112301872).

Almost surely, 2^155891256859 is an apocalyptic number.

155891256859 is a deficient number, since it is larger than the sum of its proper divisors (21905573093).

155891256859 is a wasteful number, since it uses less digits than its factorization.

155891256859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7781826.

The product of its digits is 38880000, while the sum is 64.

The spelling of 155891256859 in words is "one hundred fifty-five billion, eight hundred ninety-one million, two hundred fifty-six thousand, eight hundred fifty-nine".