155500001505 has 40 divisors (see below), whose sum is σ = 279350535552. Its totient is φ = 82754112672.

The previous prime is 155500001413. The next prime is 155500001507. The reversal of 155500001505 is 505100005551.

155500001505 is a `hidden beast` number, since 1 + 5 + 5 + 500 + 0 + 0 + 150 + 5 = 666.

It is not a de Polignac number, because 155500001505 - 2¹⁸ = 155499739361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (155500001507) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 227119 + ... + 602148.

Almost surely, 2^155500001505 is an apocalyptic number.

155500001505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155500001505 is a deficient number, since it is larger than the sum of its proper divisors (123850534047).

155500001505 is an equidigital number, since it uses as much as digits as its factorization.

155500001505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829747 (or 829738 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 27.

The spelling of 155500001505 in words is "one hundred fifty-five billion, five hundred million, one thousand, five hundred five".