1628165137 has 2 divisors, whose sum is σ = 1628165138. Its totient is φ = 1628165136.

The previous prime is 1628165093. The next prime is 1628165153. The reversal of 1628165137 is 7315618261.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1524043521 + 104121616 = 39039^2 + 10204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1628165137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1628165137.

It is not a weakly prime, because it can be changed into another prime (1628165197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814082568 + 814082569.

It is an arithmetic number, because the mean of its divisors is an integer number (814082569).

Almost surely, 2^1628165137 is an apocalyptic number.

It is an amenable number.

1628165137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1628165137 is an equidigital number, since it uses as much as digits as its factorization.

1628165137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 1628165137 is about 40350.5283360701. The cubic root of 1628165137 is about 1176.4301612619.

It can be divided in two parts, 16281 and 65137, that added together give a palindrome (81418).

The spelling of 1628165137 in words is "one billion, six hundred twenty-eight million, one hundred sixty-five thousand, one hundred thirty-seven".