1005505806087 has 40 divisors (see below), whose sum is σ = 1555227181200. Its totient is φ = 646647152256.

The previous prime is 1005505806061. The next prime is 1005505806091. The reversal of 1005505806087 is 7806085055001.

1005505806087 is a `hidden beast` number, since 1 + 0 + 0 + 5 + 5 + 0 + 580 + 60 + 8 + 7 = 666.

It is not a de Polignac number, because 1005505806087 - 2⁶ = 1005505806023 is a prime.

It is a super-2 number, since 2×1005505806087² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005505807087) 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, 2462448 + ... + 2841594.

It is an arithmetic number, because the mean of its divisors is an integer number (38880679530).

Almost surely, 2^{1005505806087} is an apocalyptic number.

1005505806087 is a deficient number, since it is larger than the sum of its proper divisors (549721375113).

1005505806087 is a wasteful number, since it uses less digits than its factorization.

1005505806087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380317 (or 380308 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The spelling of 1005505806087 in words is "one trillion, five billion, five hundred five million, eight hundred six thousand, eighty-seven".