1646144113 has 8 divisors (see below), whose sum is σ = 1700212736. Its totient is φ = 1592136000.

The previous prime is 1646144083. The next prime is 1646144209. The reversal of 1646144113 is 3114416461.

It is a happy number.

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-1646144113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646144713) 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, 43888 + ... + 72238.

It is an arithmetic number, because the mean of its divisors is an integer number (212526592).

Almost surely, 2^1646144113 is an apocalyptic number.

It is an amenable number.

1646144113 is a deficient number, since it is larger than the sum of its proper divisors (54068623).

1646144113 is a wasteful number, since it uses less digits than its factorization.

1646144113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30255.

The product of its digits is 6912, while the sum is 31.

The square root of 1646144113 is about 40572.7015738415. The cubic root of 1646144113 is about 1180.7445538044.

The spelling of 1646144113 in words is "one billion, six hundred forty-six million, one hundred forty-four thousand, one hundred thirteen".