1601698590 has 32 divisors (see below), whose sum is σ = 4271196960. Its totient is φ = 427119552.

The previous prime is 1601698589. The next prime is 1601698591. The reversal of 1601698590 is 958961061.

It is an interprime number because it is at equal distance from previous prime (1601698589) and next prime (1601698591).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601698591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2965839 + ... + 2966378.

It is an arithmetic number, because the mean of its divisors is an integer number (133474905).

Almost surely, 2^1601698590 is an apocalyptic number.

1601698590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1601698590 is an abundant number, since it is smaller than the sum of its proper divisors (2669498370).

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

1601698590 is a wasteful number, since it uses less digits than its factorization.

1601698590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5932233 (or 5932227 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1601698590 is about 40021.2267428174. The cubic root of 1601698590 is about 1170.0208411804.

The spelling of 1601698590 in words is "one billion, six hundred one million, six hundred ninety-eight thousand, five hundred ninety".