10001000605491 has 64 divisors (see below), whose sum is σ = 17044103731200. Its totient is φ = 5677411627008.

The previous prime is 10001000605489. The next prime is 10001000605507. The reversal of 10001000605491 is 19450600010001.

10001000605491 is a `hidden beast` number, since 1 + 0 + 0 + 0 + 10 + 0 + 0 + 605 + 49 + 1 = 666.

It is not a de Polignac number, because 10001000605491 - 2¹ = 10001000605489 is a prime.

It is a super-2 number, since 2×10001000605491² (a number of 27 digits) contains 22 as substring.

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 (10001000605991) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 26330215 + ... + 26707343.

It is an arithmetic number, because the mean of its divisors is an integer number (266314120800).

Almost surely, 2^{10001000605491} is an apocalyptic number.

10001000605491 is a deficient number, since it is larger than the sum of its proper divisors (7043103125709).

10001000605491 is a wasteful number, since it uses less digits than its factorization.

10001000605491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378065 (or 378059 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 10001000605491 its reverse (19450600010001), we get a palindrome (29451600615492).

The spelling of 10001000605491 in words is "ten trillion, one billion, six hundred five thousand, four hundred ninety-one".