1606868646 has 32 divisors (see below), whose sum is σ = 3384685440. Its totient is φ = 507161664.

The previous prime is 1606868621. The next prime is 1606868651. The reversal of 1606868646 is 6468686061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407641 + ... + 411563.

It is an arithmetic number, because the mean of its divisors is an integer number (105771420).

Almost surely, 2^1606868646 is an apocalyptic number.

1606868646 is an abundant number, since it is smaller than the sum of its proper divisors (1777816794).

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

1606868646 is a wasteful number, since it uses less digits than its factorization.

1606868646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7540.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The square root of 1606868646 is about 40085.7661271429. The cubic root of 1606868646 is about 1171.2783762408.

The spelling of 1606868646 in words is "one billion, six hundred six million, eight hundred sixty-eight thousand, six hundred forty-six".