1616251165 has 16 divisors (see below), whose sum is σ = 1977768576. Its totient is φ = 1267531200.

The previous prime is 1616251141. The next prime is 1616251199. The reversal of 1616251165 is 5611526161.

It is not a de Polignac number, because 1616251165 - 2⁹ = 1616250653 is a prime.

It is a super-2 number, since 2×1616251165² = 5224535656727714450, 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 1616251165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 483550 + ... + 486880.

It is an arithmetic number, because the mean of its divisors is an integer number (123610536).

Almost surely, 2^1616251165 is an apocalyptic number.

It is an amenable number.

1616251165 is a deficient number, since it is larger than the sum of its proper divisors (361517411).

1616251165 is a wasteful number, since it uses less digits than its factorization.

1616251165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5220.

The product of its digits is 10800, while the sum is 34.

The square root of 1616251165 is about 40202.6263445561. The cubic root of 1616251165 is about 1173.5536548127.

The spelling of 1616251165 in words is "one billion, six hundred sixteen million, two hundred fifty-one thousand, one hundred sixty-five".