1005605000051 has 4 divisors (see below), whose sum is σ = 1005631737792. Its totient is φ = 1005578262312.

The previous prime is 1005605000041. The next prime is 1005605000053. The reversal of 1005605000051 is 1500005065001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1005605000051 - 2²² = 1005600805747 is a prime.

It is a super-2 number, since 2×1005605000051² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1005604999990 and 1005605000026.

It is not an unprimeable number, because it can be changed into a prime (1005605000053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13312376 + ... + 13387701.

It is an arithmetic number, because the mean of its divisors is an integer number (251407934448).

Almost surely, 2^{1005605000051} is an apocalyptic number.

1005605000051 is a deficient number, since it is larger than the sum of its proper divisors (26737741).

1005605000051 is an equidigital number, since it uses as much as digits as its factorization.

1005605000051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26737740.

The product of its (nonzero) digits is 750, while the sum is 23.

The spelling of 1005605000051 in words is "one trillion, five billion, six hundred five million, fifty-one", and thus it is an aban number.