1616464421 has 16 divisors (see below), whose sum is σ = 1900832640. Its totient is φ = 1355209920.

The previous prime is 1616464351. The next prime is 1616464427. The reversal of 1616464421 is 1244646161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616464421 is a prime.

It is a super-2 number, since 2×1616464421² = 5225914448717730482, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616464427) 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, 168800 + ... + 178118.

It is an arithmetic number, because the mean of its divisors is an integer number (118802040).

Almost surely, 2^1616464421 is an apocalyptic number.

1616464421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1616464421 is a deficient number, since it is larger than the sum of its proper divisors (284368219).

1616464421 is a wasteful number, since it uses less digits than its factorization.

1616464421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10556.

The product of its digits is 27648, while the sum is 35.

The square root of 1616464421 is about 40205.2785216071. The cubic root of 1616464421 is about 1173.6052673255.

The spelling of 1616464421 in words is "one billion, six hundred sixteen million, four hundred sixty-four thousand, four hundred twenty-one".