1613217973220 has 36 divisors (see below), whose sum is σ = 3940861051260. Its totient is φ = 553103304768.

The previous prime is 1613217973183. The next prime is 1613217973243. The reversal of 1613217973220 is 223797123161.

It can be written as a sum of positive squares in 2 ways, for example, as 354675038116 + 1258542935104 = 595546^2 + 1121848^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 823069415 + ... + 823071374.

It is an arithmetic number, because the mean of its divisors is an integer number (109468362535).

Almost surely, 2^{1613217973220} is an apocalyptic number.

1613217973220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1613217973220 is an abundant number, since it is smaller than the sum of its proper divisors (2327643078040).

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

1613217973220 is a wasteful number, since it uses less digits than its factorization.

1613217973220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646140812 (or 1646140803 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 1613217973220 in words is "one trillion, six hundred thirteen billion, two hundred seventeen million, nine hundred seventy-three thousand, two hundred twenty".