1601656550 has 24 divisors (see below), whose sum is σ = 3208242576. Its totient is φ = 591380640.

The previous prime is 1601656523. The next prime is 1601656559. The reversal of 1601656550 is 556561061.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1601656550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601656559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231394 + ... + 1232693.

It is an arithmetic number, because the mean of its divisors is an integer number (133676774).

Almost surely, 2^1601656550 is an apocalyptic number.

1601656550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601656550 is an abundant number, since it is smaller than the sum of its proper divisors (1606586026).

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

1601656550 is a wasteful number, since it uses less digits than its factorization.

1601656550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2464112 (or 2464107 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 1601656550 is about 40020.7015180894. The cubic root of 1601656550 is about 1170.0106045256.

The spelling of 1601656550 in words is "one billion, six hundred one million, six hundred fifty-six thousand, five hundred fifty".