145268640193 has 4 divisors (see below), whose sum is σ = 153813854340. Its totient is φ = 136723426048.

The previous prime is 145268640173. The next prime is 145268640203. The reversal of 145268640193 is 391046862541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118689207169 + 26579433024 = 344513^2 + 163032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145268640193 is a prime.

It is a super-2 number, since 2×145268640193² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145268640163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4272607048 + ... + 4272607081.

It is an arithmetic number, because the mean of its divisors is an integer number (38453463585).

Almost surely, 2^145268640193 is an apocalyptic number.

It is an amenable number.

145268640193 is a deficient number, since it is larger than the sum of its proper divisors (8545214147).

145268640193 is an equidigital number, since it uses as much as digits as its factorization.

145268640193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8545214146.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 145268640193 in words is "one hundred forty-five billion, two hundred sixty-eight million, six hundred forty thousand, one hundred ninety-three".