155023501805485 has 16 divisors (see below), whose sum is σ = 186357551860800. Its totient is φ = 123799240625536.

The previous prime is 155023501805461. The next prime is 155023501805489. The reversal of 155023501805485 is 584508105320551.

It is a cyclic number.

It is not a de Polignac number, because 155023501805485 - 2⁹ = 155023501804973 is a prime.

It is a super-2 number, since 2×155023501805485² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155023501805489) 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, 251129982 + ... + 251746528.

It is an arithmetic number, because the mean of its divisors is an integer number (11647346991300).

Almost surely, 2^{155023501805485} is an apocalyptic number.

It is an amenable number.

155023501805485 is a deficient number, since it is larger than the sum of its proper divisors (31334050055315).

155023501805485 is an equidigital number, since it uses as much as digits as its factorization.

155023501805485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705500.

The product of its (nonzero) digits is 4800000, while the sum is 52.

The spelling of 155023501805485 in words is "one hundred fifty-five trillion, twenty-three billion, five hundred one million, eight hundred five thousand, four hundred eighty-five".