155131001189 has 2 divisors, whose sum is σ = 155131001190. Its totient is φ = 155131001188.

The previous prime is 155131001183. The next prime is 155131001273. The reversal of 155131001189 is 981100131551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154639270564 + 491730625 = 393242^2 + 22175^2 .

It is a cyclic number.

It is not a de Polignac number, because 155131001189 - 2²⁴ = 155114223973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155131001183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77565500594 + 77565500595.

It is an arithmetic number, because the mean of its divisors is an integer number (77565500595).

Almost surely, 2^155131001189 is an apocalyptic number.

It is an amenable number.

155131001189 is a deficient number, since it is larger than the sum of its proper divisors (1).

155131001189 is an equidigital number, since it uses as much as digits as its factorization.

155131001189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 35.

The spelling of 155131001189 in words is "one hundred fifty-five billion, one hundred thirty-one million, one thousand, one hundred eighty-nine".