1616209894 has 16 divisors (see below), whose sum is σ = 2622517632. Its totient is φ = 742595328.

The previous prime is 1616209877. The next prime is 1616209897. The reversal of 1616209894 is 4989026161.

It is a happy number.

It is a super-2 number, since 2×1616209894² = 5224268842926982472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616209897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133579 + ... + 145174.

It is an arithmetic number, because the mean of its divisors is an integer number (163907352).

Almost surely, 2^1616209894 is an apocalyptic number.

1616209894 is a deficient number, since it is larger than the sum of its proper divisors (1006307738).

1616209894 is a wasteful number, since it uses less digits than its factorization.

1616209894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278991.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1616209894 is about 40202.1130539179. The cubic root of 1616209894 is about 1173.5436658237.

The spelling of 1616209894 in words is "one billion, six hundred sixteen million, two hundred nine thousand, eight hundred ninety-four".