1005606551 has 16 divisors (see below), whose sum is σ = 1057901568. Its totient is φ = 954676800.

The previous prime is 1005606541. The next prime is 1005606571. The reversal of 1005606551 is 1556065001.

It is a cyclic number.

It is not a de Polignac number, because 1005606551 - 2²⁶ = 938497687 is a prime.

It is a super-2 number, since 2×1005606551² = 2022489070828231202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1005606541) 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, 582776 + ... + 584498.

It is an arithmetic number, because the mean of its divisors is an integer number (66118848).

Almost surely, 2^1005606551 is an apocalyptic number.

1005606551 is a deficient number, since it is larger than the sum of its proper divisors (52295017).

1005606551 is a wasteful number, since it uses less digits than its factorization.

1005606551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102.

The product of its (nonzero) digits is 4500, while the sum is 29.

The square root of 1005606551 is about 31711.3000521896. The cubic root of 1005606551 is about 1001.8653685699.

The spelling of 1005606551 in words is "one billion, five million, six hundred six thousand, five hundred fifty-one".