1616543101 has 4 divisors (see below), whose sum is σ = 1617700000. Its totient is φ = 1615386204.

The previous prime is 1616543069. The next prime is 1616543111. The reversal of 1616543101 is 1013456161.

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: 1013456161 = 79 ⋅12828559.

It is a cyclic number.

It is not a de Polignac number, because 1616543101 - 2⁵ = 1616543069 is a prime.

It is a super-2 number, since 2×1616543101² = 5226423194781392402, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1616543101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616543111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576351 + ... + 579148.

It is an arithmetic number, because the mean of its divisors is an integer number (404425000).

Almost surely, 2^1616543101 is an apocalyptic number.

It is an amenable number.

1616543101 is a deficient number, since it is larger than the sum of its proper divisors (1156899).

1616543101 is a wasteful number, since it uses less digits than its factorization.

1616543101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156898.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1616543101 is about 40206.2569881853. The cubic root of 1616543101 is about 1173.6243084218.

Adding to 1616543101 its reverse (1013456161), we get a palindrome (2629999262).

The spelling of 1616543101 in words is "one billion, six hundred sixteen million, five hundred forty-three thousand, one hundred one".