155065106501001 has 6 divisors (see below), whose sum is σ = 223982931612570. Its totient is φ = 103376737667328.

The previous prime is 155065106500999. The next prime is 155065106501021. The reversal of 155065106501001 is 100105601560551.

It is a happy number.

155065106501001 is a `hidden beast` number, since 1 + 550 + 6 + 51 + 0 + 6 + 50 + 1 + 0 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 141748073640000 + 13317032861001 = 11905800^2 + 3649251^2 .

It is not a de Polignac number, because 155065106501001 - 2¹ = 155065106500999 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155065106501021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8614728138936 + ... + 8614728138953.

It is an arithmetic number, because the mean of its divisors is an integer number (37330488602095).

Almost surely, 2^{155065106501001} is an apocalyptic number.

It is an amenable number.

155065106501001 is a deficient number, since it is larger than the sum of its proper divisors (68917825111569).

155065106501001 is a wasteful number, since it uses less digits than its factorization.

155065106501001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17229456277895 (or 17229456277892 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 155065106501001 in words is "one hundred fifty-five trillion, sixty-five billion, one hundred six million, five hundred one thousand, one".