145871894507 has 2 divisors, whose sum is σ = 145871894508. Its totient is φ = 145871894506.

The previous prime is 145871894491. The next prime is 145871894521. The reversal of 145871894507 is 705498178541.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 145871894507 - 2⁴ = 145871894491 is a prime.

It is a super-2 number, since 2×145871894507² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145871894537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72935947253 + 72935947254.

It is an arithmetic number, because the mean of its divisors is an integer number (72935947254).

Almost surely, 2^145871894507 is an apocalyptic number.

145871894507 is a deficient number, since it is larger than the sum of its proper divisors (1).

145871894507 is an equidigital number, since it uses as much as digits as its factorization.

145871894507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11289600, while the sum is 59.

The spelling of 145871894507 in words is "one hundred forty-five billion, eight hundred seventy-one million, eight hundred ninety-four thousand, five hundred seven".