1607121664 has 36 divisors (see below), whose sum is σ = 3213372400. Its totient is φ = 802206720.

The previous prime is 1607121647. The next prime is 1607121671. The reversal of 1607121664 is 4661217061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156562 + ... + 166510.

Almost surely, 2^1607121664 is an apocalyptic number.

It is an amenable number.

1607121664 is a deficient number, since it is larger than the sum of its proper divisors (1606250736).

1607121664 is an frugal number, since it uses more digits than its factorization.

1607121664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10596 (or 10582 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1607121664 is about 40088.9219610605. The cubic root of 1607121664 is about 1171.3398496246.

The spelling of 1607121664 in words is "one billion, six hundred seven million, one hundred twenty-one thousand, six hundred sixty-four".