1601996090 has 16 divisors (see below), whose sum is σ = 2884156200. Its totient is φ = 640673280.

The previous prime is 1601996057. The next prime is 1601996119. The reversal of 1601996090 is 906991061.

It can be written as a sum of positive squares in 4 ways, for example, as 1335098521 + 266897569 = 36539^2 + 16337^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52070 + ... + 76910.

Almost surely, 2^1601996090 is an apocalyptic number.

1601996090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601996090 is a deficient number, since it is larger than the sum of its proper divisors (1282160110).

1601996090 is a wasteful number, since it uses less digits than its factorization.

1601996090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31297.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 1601996090 is about 40024.9433478675. The cubic root of 1601996090 is about 1170.0932767089.

The spelling of 1601996090 in words is "one billion, six hundred one million, nine hundred ninety-six thousand, ninety".