145387666513 has 2 divisors, whose sum is σ = 145387666514. Its totient is φ = 145387666512.

The previous prime is 145387666477. The next prime is 145387666621. The reversal of 145387666513 is 315666783541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96902709264 + 48484957249 = 311292^2 + 220193^2 .

It is a cyclic number.

It is not a de Polignac number, because 145387666513 - 2¹³ = 145387658321 is a prime.

It is a super-2 number, since 2×145387666513² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145387666013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72693833256 + 72693833257.

It is an arithmetic number, because the mean of its divisors is an integer number (72693833257).

Almost surely, 2^145387666513 is an apocalyptic number.

It is an amenable number.

145387666513 is a deficient number, since it is larger than the sum of its proper divisors (1).

145387666513 is an equidigital number, since it uses as much as digits as its factorization.

145387666513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10886400, while the sum is 55.

The spelling of 145387666513 in words is "one hundred forty-five billion, three hundred eighty-seven million, six hundred sixty-six thousand, five hundred thirteen".