1005155064531 has 16 divisors (see below), whose sum is σ = 1489227361920. Its totient is φ = 670054439880.

The previous prime is 1005155064509. The next prime is 1005155064559. The reversal of 1005155064531 is 1354605515001.

1005155064531 is a `hidden beast` number, since 1 + 0 + 0 + 5 + 1 + 5 + 5 + 0 + 645 + 3 + 1 = 666.

It is not a de Polignac number, because 1005155064531 - 2⁵ = 1005155064499 is a prime.

It is a super-2 number, since 2×1005155064531² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1005155064631) 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, 980865 + ... + 1724066.

It is an arithmetic number, because the mean of its divisors is an integer number (93076710120).

Almost surely, 2^{1005155064531} is an apocalyptic number.

1005155064531 is a deficient number, since it is larger than the sum of its proper divisors (484072297389).

1005155064531 is a wasteful number, since it uses less digits than its factorization.

1005155064531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2718703 (or 2718697 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 1005155064531 in words is "one trillion, five billion, one hundred fifty-five million, sixty-four thousand, five hundred thirty-one".