1005556055051 has 4 divisors (see below), whose sum is σ = 1013473819392. Its totient is φ = 997638290712.

The previous prime is 1005556055047. The next prime is 1005556055057. The reversal of 1005556055051 is 1505506555001.

It is a happy number.

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 1005556055051 - 2² = 1005556055047 is a prime.

It is a super-2 number, since 2×1005556055051² (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 = 1005556054996 and 1005556055014.

It is not an unprimeable number, because it can be changed into a prime (1005556055057) 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, 3958881980 + ... + 3958882233.

It is an arithmetic number, because the mean of its divisors is an integer number (253368454848).

Almost surely, 2^{1005556055051} is an apocalyptic number.

1005556055051 is a deficient number, since it is larger than the sum of its proper divisors (7917764341).

1005556055051 is an equidigital number, since it uses as much as digits as its factorization.

1005556055051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7917764340.

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 1005556055051 in words is "one trillion, five billion, five hundred fifty-six million, fifty-five thousand, fifty-one".