1621006064 has 10 divisors (see below), whose sum is σ = 3140699280. Its totient is φ = 810503024.

The previous prime is 1621006043. The next prime is 1621006087. The reversal of 1621006064 is 4606001261.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50656424 + ... + 50656455.

It is an arithmetic number, because the mean of its divisors is an integer number (314069928).

Almost surely, 2^1621006064 is an apocalyptic number.

It is an amenable number.

1621006064 is a deficient number, since it is larger than the sum of its proper divisors (1519693216).

1621006064 is a wasteful number, since it uses less digits than its factorization.

1621006064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101312887 (or 101312881 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 1621006064 is about 40261.7195857306. The cubic root of 1621006064 is about 1174.7033659527.

The spelling of 1621006064 in words is "one billion, six hundred twenty-one million, six thousand, sixty-four".