1616165243 has 16 divisors (see below), whose sum is σ = 2016605184. Its totient is φ = 1258320960.

The previous prime is 1616165237. The next prime is 1616165249. The reversal of 1616165243 is 3425616161.

It is an interprime number because it is at equal distance from previous prime (1616165237) and next prime (1616165249).

It is a cyclic number.

It is not a de Polignac number, because 1616165243 - 2⁶ = 1616165179 is a prime.

It is a super-2 number, since 2×1616165243² = 5223980185362498098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616165249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94271 + ... + 110087.

It is an arithmetic number, because the mean of its divisors is an integer number (126037824).

Almost surely, 2^1616165243 is an apocalyptic number.

1616165243 is a deficient number, since it is larger than the sum of its proper divisors (400439941).

1616165243 is a wasteful number, since it uses less digits than its factorization.

1616165243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17162.

The product of its digits is 25920, while the sum is 35.

The square root of 1616165243 is about 40201.5577185760. The cubic root of 1616165243 is about 1173.5328585680.

The spelling of 1616165243 in words is "one billion, six hundred sixteen million, one hundred sixty-five thousand, two hundred forty-three".