1616812699 has 4 divisors (see below), whose sum is σ = 1617506280. Its totient is φ = 1616119120.

The previous prime is 1616812697. The next prime is 1616812709. The reversal of 1616812699 is 9962186161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1616812699 - 2¹ = 1616812697 is a prime.

It is a super-2 number, since 2×1616812699² = 5228166607295329202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1616812697) 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, 343282 + ... + 347959.

It is an arithmetic number, because the mean of its divisors is an integer number (404376570).

Almost surely, 2^1616812699 is an apocalyptic number.

1616812699 is a deficient number, since it is larger than the sum of its proper divisors (693581).

1616812699 is an equidigital number, since it uses as much as digits as its factorization.

1616812699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693580.

The product of its digits is 279936, while the sum is 49.

The square root of 1616812699 is about 40209.6095355327. The cubic root of 1616812699 is about 1173.6895482904.

The spelling of 1616812699 in words is "one billion, six hundred sixteen million, eight hundred twelve thousand, six hundred ninety-nine".