1651244166 has 144 divisors (see below), whose sum is σ = 4383222480. Its totient is φ = 445737600.

The previous prime is 1651244131. The next prime is 1651244173. The reversal of 1651244166 is 6614421561.

It is a self number, because there is not a number n which added to its sum of digits gives 1651244166.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 820101 + ... + 822111.

It is an arithmetic number, because the mean of its divisors is an integer number (30439045).

Almost surely, 2^1651244166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1651244166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2191611240).

1651244166 is an abundant number, since it is smaller than the sum of its proper divisors (2731978314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1651244166 is a wasteful number, since it uses less digits than its factorization.

1651244166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083 (or 2069 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 1651244166 is about 40635.5037621044. The cubic root of 1651244166 is about 1181.9626835943.

The spelling of 1651244166 in words is "one billion, six hundred fifty-one million, two hundred forty-four thousand, one hundred sixty-six".