1616464065 has 16 divisors (see below), whose sum is σ = 2599344000. Its totient is φ = 857780352.

The previous prime is 1616464061. The next prime is 1616464067. The reversal of 1616464065 is 5604646161.

It is a happy number.

It is not a de Polignac number, because 1616464065 - 2² = 1616464061 is a prime.

It is a super-2 number, since 2×1616464065² = 5225912146872648450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1616464061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 267780 + ... + 273749.

It is an arithmetic number, because the mean of its divisors is an integer number (162459000).

Almost surely, 2^1616464065 is an apocalyptic number.

1616464065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1616464065 is a deficient number, since it is larger than the sum of its proper divisors (982879935).

1616464065 is a wasteful number, since it uses less digits than its factorization.

1616464065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541736.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 1616464065 is about 40205.2740943275. The cubic root of 1616464065 is about 1173.6051811697.

The spelling of 1616464065 in words is "one billion, six hundred sixteen million, four hundred sixty-four thousand, sixty-five".