1601961090 has 32 divisors (see below), whose sum is σ = 3845900736. Its totient is φ = 427056960.

The previous prime is 1601961083. The next prime is 1601961091. The reversal of 1601961090 is 901691061.

It is a super-3 number, since 3×1601961090³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1601961091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125085 + ... + 137295.

It is an arithmetic number, because the mean of its divisors is an integer number (120184398).

Almost surely, 2^1601961090 is an apocalyptic number.

1601961090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601961090 is an abundant number, since it is smaller than the sum of its proper divisors (2243939646).

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

1601961090 is a wasteful number, since it uses less digits than its factorization.

1601961090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16594.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 1601961090 is about 40024.5061181272. The cubic root of 1601961090 is about 1170.0847553475.

The spelling of 1601961090 in words is "one billion, six hundred one million, nine hundred sixty-one thousand, ninety".