1616435646 has 32 divisors (see below), whose sum is σ = 3697532928. Its totient is φ = 461485920.

The previous prime is 1616435641. The next prime is 1616435651. The reversal of 1616435646 is 6465346161.

It is an interprime number because it is at equal distance from previous prime (1616435641) and next prime (1616435651).

It is a super-2 number, since 2×1616435646² = 5225728395318874632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1616435598 and 1616435607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616435641) 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, 43651 + ... + 71681.

It is an arithmetic number, because the mean of its divisors is an integer number (115547904).

Almost surely, 2^1616435646 is an apocalyptic number.

1616435646 is an abundant number, since it is smaller than the sum of its proper divisors (2081097282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616435646 is a wasteful number, since it uses less digits than its factorization.

1616435646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29416.

The product of its digits is 311040, while the sum is 42.

The square root of 1616435646 is about 40204.9206689927. The cubic root of 1616435646 is about 1173.5983034251.

The spelling of 1616435646 in words is "one billion, six hundred sixteen million, four hundred thirty-five thousand, six hundred forty-six".