1616465633 has 2 divisors, whose sum is σ = 1616465634. Its totient is φ = 1616465632.

The previous prime is 1616465629. The next prime is 1616465663. The reversal of 1616465633 is 3365646161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1529826769 + 86638864 = 39113^2 + 9308^2 .

It is a cyclic number.

It is not a de Polignac number, because 1616465633 - 2² = 1616465629 is a prime.

It is a super-2 number, since 2×1616465633² = 5225922285340181378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1616465663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 808232816 + 808232817.

It is an arithmetic number, because the mean of its divisors is an integer number (808232817).

Almost surely, 2^1616465633 is an apocalyptic number.

It is an amenable number.

1616465633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1616465633 is an equidigital number, since it uses as much as digits as its factorization.

1616465633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 41.

The square root of 1616465633 is about 40205.2935942520. The cubic root of 1616465633 is about 1173.6055606425.

The spelling of 1616465633 in words is "one billion, six hundred sixteen million, four hundred sixty-five thousand, six hundred thirty-three".