1505155551255 has 24 divisors (see below), whose sum is σ = 2608970364000. Its totient is φ = 802739142720.

The previous prime is 1505155551239. The next prime is 1505155551257. The reversal of 1505155551255 is 5521555515051.

1505155551255 is a `hidden beast` number, since 1 + 5 + 0 + 515 + 5 + 5 + 5 + 125 + 5 = 666.

It is not a de Polignac number, because 1505155551255 - 2⁴ = 1505155551239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1505155551255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1505155551257) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4286025 + ... + 4623885.

It is an arithmetic number, because the mean of its divisors is an integer number (108707098500).

Almost surely, 2^{1505155551255} is an apocalyptic number.

1505155551255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1505155551255 is a deficient number, since it is larger than the sum of its proper divisors (1103814812745).

1505155551255 is a wasteful number, since it uses less digits than its factorization.

1505155551255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436871 (or 436868 counting only the distinct ones).

The product of its (nonzero) digits is 781250, while the sum is 45.

The spelling of 1505155551255 in words is "one trillion, five hundred five billion, one hundred fifty-five million, five hundred fifty-one thousand, two hundred fifty-five".