1051605646 has 16 divisors (see below), whose sum is σ = 1941426144. Its totient is φ = 416019744.

The previous prime is 1051605641. The next prime is 1051605713. The reversal of 1051605646 is 6465061501.

It is a happy number.

It is a super-2 number, since 2×1051605646² = 2211748869398154632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051605641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2888845 + ... + 2889208.

It is an arithmetic number, because the mean of its divisors is an integer number (121339134).

Almost surely, 2^1051605646 is an apocalyptic number.

1051605646 is a deficient number, since it is larger than the sum of its proper divisors (889820498).

1051605646 is a wasteful number, since it uses less digits than its factorization.

1051605646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5778075.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1051605646 is about 32428.4696832891. The cubic root of 1051605646 is about 1016.9141795409.

The spelling of 1051605646 in words is "one billion, fifty-one million, six hundred five thousand, six hundred forty-six".