1601745516 has 300 divisors, whose sum is σ = 5124485520. Its totient is φ = 435637440.

The previous prime is 1601745499. The next prime is 1601745533. The reversal of 1601745516 is 6155471061.

It is a happy number.

1601745516 is a `hidden beast` number, since 1 + 601 + 7 + 45 + 5 + 1 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1601745499) and next prime (1601745533).

It is a super-2 number, since 2×1601745516² = 5131177396052212512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 99 ways as a sum of consecutive naturals, for example, 22559761 + ... + 22559831.

Almost surely, 2^1601745516 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1601745516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2562242760).

1601745516 is an abundant number, since it is smaller than the sum of its proper divisors (3522740004).

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

1601745516 is an equidigital number, since it uses as much as digits as its factorization.

1601745516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 1601745516 is about 40021.8130024116. The cubic root of 1601745516 is about 1170.0322673547.

The spelling of 1601745516 in words is "one billion, six hundred one million, seven hundred forty-five thousand, five hundred sixteen".