155859655673 has 2 divisors, whose sum is σ = 155859655674. Its totient is φ = 155859655672.

The previous prime is 155859655667. The next prime is 155859655681. The reversal of 155859655673 is 376556958551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138326717929 + 17532937744 = 371923^2 + 132412^2 .

It is a cyclic number.

It is not a de Polignac number, because 155859655673 - 2⁴ = 155859655657 is a prime.

It is a super-2 number, since 2×155859655673² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (155859655373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77929827836 + 77929827837.

It is an arithmetic number, because the mean of its divisors is an integer number (77929827837).

Almost surely, 2^155859655673 is an apocalyptic number.

It is an amenable number.

155859655673 is a deficient number, since it is larger than the sum of its proper divisors (1).

155859655673 is an equidigital number, since it uses as much as digits as its factorization.

155859655673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100000, while the sum is 65.

The spelling of 155859655673 in words is "one hundred fifty-five billion, eight hundred fifty-nine million, six hundred fifty-five thousand, six hundred seventy-three".