1621164846 has 128 divisors (see below), whose sum is σ = 4075868160. Its totient is φ = 419328000.

The previous prime is 1621164833. The next prime is 1621164847. The reversal of 1621164846 is 6484611261.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1621164847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2312296 + ... + 2312996.

It is an arithmetic number, because the mean of its divisors is an integer number (31842720).

Almost surely, 2^1621164846 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1621164846, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2037934080).

1621164846 is an abundant number, since it is smaller than the sum of its proper divisors (2454703314).

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

1621164846 is a wasteful number, since it uses less digits than its factorization.

1621164846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850.

The product of its digits is 55296, while the sum is 39.

The square root of 1621164846 is about 40263.6914105004. The cubic root of 1621164846 is about 1174.7417198417.

The spelling of 1621164846 in words is "one billion, six hundred twenty-one million, one hundred sixty-four thousand, eight hundred forty-six".