1613755220 has 216 divisors, whose sum is σ = 4483100160. Its totient is φ = 485654400.

The previous prime is 1613755217. The next prime is 1613755229. The reversal of 1613755220 is 225573161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613755229) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3675761 + ... + 3676199.

Almost surely, 2^1613755220 is an apocalyptic number.

1613755220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1613755220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2241550080).

1613755220 is an abundant number, since it is smaller than the sum of its proper divisors (2869344940).

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

1613755220 is a wasteful number, since it uses less digits than its factorization.

1613755220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 1613755220 is about 40171.5722868797. The cubic root of 1613755220 is about 1172.9492449429.

The spelling of 1613755220 in words is "one billion, six hundred thirteen million, seven hundred fifty-five thousand, two hundred twenty".