1616939890 has 8 divisors (see below), whose sum is σ = 2910491820. Its totient is φ = 646775952.

The previous prime is 1616939873. The next prime is 1616939959. The reversal of 1616939890 is 989396161.

It can be written as a sum of positive squares in 2 ways, for example, as 1596082401 + 20857489 = 39951^2 + 4567^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1616939890² = 5228989215746424200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80846985 + ... + 80847004.

Almost surely, 2^1616939890 is an apocalyptic number.

1616939890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1616939890 is a deficient number, since it is larger than the sum of its proper divisors (1293551930).

1616939890 is a wasteful number, since it uses less digits than its factorization.

1616939890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161693996.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 1616939890 is about 40211.1911039700. The cubic root of 1616939890 is about 1173.7203246512.

The spelling of 1616939890 in words is "one billion, six hundred sixteen million, nine hundred thirty-nine thousand, eight hundred ninety".