1616700465 has 20 divisors (see below), whose sum is σ = 2898086004. Its totient is φ = 862240032.

The previous prime is 1616700461. The next prime is 1616700467. The reversal of 1616700465 is 5640076161.

It can be written as a sum of positive squares in 2 ways, for example, as 1252310544 + 364389921 = 35388^2 + 19089^2 .

It is not a de Polignac number, because 1616700465 - 2² = 1616700461 is a prime.

It is a super-2 number, since 2×1616700465² = 5227440787062432450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1616700461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1995522 + ... + 1996331.

Almost surely, 2^1616700465 is an apocalyptic number.

1616700465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1616700465 is a deficient number, since it is larger than the sum of its proper divisors (1281385539).

1616700465 is an equidigital number, since it uses as much as digits as its factorization.

1616700465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991870 (or 3991861 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1616700465 is about 40208.2138996499. The cubic root of 1616700465 is about 1173.6623897290.

The spelling of 1616700465 in words is "one billion, six hundred sixteen million, seven hundred thousand, four hundred sixty-five".