145639216237 has 2 divisors, whose sum is σ = 145639216238. Its totient is φ = 145639216236.

The previous prime is 145639216213. The next prime is 145639216249. The reversal of 145639216237 is 732612936541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139240176201 + 6399040036 = 373149^2 + 79994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145639216237 is a prime.

It is a super-2 number, since 2×145639216237² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (145639216337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72819608118 + 72819608119.

It is an arithmetic number, because the mean of its divisors is an integer number (72819608119).

Almost surely, 2^145639216237 is an apocalyptic number.

It is an amenable number.

145639216237 is a deficient number, since it is larger than the sum of its proper divisors (1).

145639216237 is an equidigital number, since it uses as much as digits as its factorization.

145639216237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 49.

The spelling of 145639216237 in words is "one hundred forty-five billion, six hundred thirty-nine million, two hundred sixteen thousand, two hundred thirty-seven".