145603661033 has 2 divisors, whose sum is σ = 145603661034. Its totient is φ = 145603661032.

The previous prime is 145603661009. The next prime is 145603661143. The reversal of 145603661033 is 330166306541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139209579664 + 6394081369 = 373108^2 + 79963^2 .

It is a cyclic number.

It is not a de Polignac number, because 145603661033 - 2¹² = 145603656937 is a prime.

It is a super-2 number, since 2×145603661033² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145603661633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72801830516 + 72801830517.

It is an arithmetic number, because the mean of its divisors is an integer number (72801830517).

Almost surely, 2^145603661033 is an apocalyptic number.

It is an amenable number.

145603661033 is a deficient number, since it is larger than the sum of its proper divisors (1).

145603661033 is an equidigital number, since it uses as much as digits as its factorization.

145603661033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 38.

Adding to 145603661033 its reverse (330166306541), we get a palindrome (475769967574).

The spelling of 145603661033 in words is "one hundred forty-five billion, six hundred three million, six hundred sixty-one thousand, thirty-three".