1616317553 has 4 divisors (see below), whose sum is σ = 1625347440. Its totient is φ = 1607287668.

The previous prime is 1616317541. The next prime is 1616317589. The reversal of 1616317553 is 3557136161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3557136161 = 1171 ⋅3037691.

It is a cyclic number.

It is not a de Polignac number, because 1616317553 - 2¹⁶ = 1616252017 is a prime.

It is a super-2 number, since 2×1616317553² = 5224964864271815618, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616317513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4514675 + ... + 4515032.

It is an arithmetic number, because the mean of its divisors is an integer number (406336860).

Almost surely, 2^1616317553 is an apocalyptic number.

It is an amenable number.

1616317553 is a deficient number, since it is larger than the sum of its proper divisors (9029887).

1616317553 is an equidigital number, since it uses as much as digits as its factorization.

1616317553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029886.

The product of its digits is 56700, while the sum is 38.

The square root of 1616317553 is about 40203.4520035283. The cubic root of 1616317553 is about 1173.5697226152.

The spelling of 1616317553 in words is "one billion, six hundred sixteen million, three hundred seventeen thousand, five hundred fifty-three".