155115312545 has 8 divisors (see below), whose sum is σ = 186164224296. Its totient is φ = 124075017216.

The previous prime is 155115312509. The next prime is 155115312563. The reversal of 155115312545 is 545213511551.

155115312545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 51145179409 + 103970133136 = 226153^2 + 322444^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155115312545 - 2¹⁸ = 155115050401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155115312499 and 155115312508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114432 + ... + 2186561.

It is an arithmetic number, because the mean of its divisors is an integer number (23270528037).

Almost surely, 2^155115312545 is an apocalyptic number.

It is an amenable number.

155115312545 is a deficient number, since it is larger than the sum of its proper divisors (31048911751).

155115312545 is an equidigital number, since it uses as much as digits as its factorization.

155115312545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4308211.

The product of its digits is 75000, while the sum is 38.

The spelling of 155115312545 in words is "one hundred fifty-five billion, one hundred fifteen million, three hundred twelve thousand, five hundred forty-five".