1601920183649 has 8 divisors (see below), whose sum is σ = 1605058772832. Its totient is φ = 1598782635520.

The previous prime is 1601920183639. The next prime is 1601920183673. The reversal of 1601920183649 is 9463810291061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1601920183649 is a prime.

It is a super-2 number, since 2×1601920183649² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1601920183597 and 1601920183606.

It is not an unprimeable number, because it can be changed into a prime (1601920183639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2856737 + ... + 3371169.

It is an arithmetic number, because the mean of its divisors is an integer number (200632346604).

Almost surely, 2^{1601920183649} is an apocalyptic number.

It is an amenable number.

1601920183649 is a deficient number, since it is larger than the sum of its proper divisors (3138589183).

1601920183649 is an equidigital number, since it uses as much as digits as its factorization.

1601920183649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520527.

The product of its (nonzero) digits is 559872, while the sum is 50.

The spelling of 1601920183649 in words is "one trillion, six hundred one billion, nine hundred twenty million, one hundred eighty-three thousand, six hundred forty-nine".