145729265218 has 4 divisors (see below), whose sum is σ = 218593897830. Its totient is φ = 72864632608.

The previous prime is 145729265203. The next prime is 145729265219. The reversal of 145729265218 is 812562927541.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812562927541 = 5641 ⋅144045901.

It can be written as a sum of positive squares in only one way, i.e., 106946658729 + 38782606489 = 327027^2 + 196933^2 .

It is not an unprimeable number, because it can be changed into a prime (145729265219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36432316303 + ... + 36432316306.

Almost surely, 2^145729265218 is an apocalyptic number.

145729265218 is a deficient number, since it is larger than the sum of its proper divisors (72864632612).

145729265218 is an equidigital number, since it uses as much as digits as its factorization.

145729265218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72864632611.

The product of its digits is 2419200, while the sum is 52.

The spelling of 145729265218 in words is "one hundred forty-five billion, seven hundred twenty-nine million, two hundred sixty-five thousand, two hundred eighteen".