145872816457 has 2 divisors, whose sum is σ = 145872816458. Its totient is φ = 145872816456.

The previous prime is 145872816449. The next prime is 145872816491. The reversal of 145872816457 is 754618278541.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145871288761 + 1527696 = 381931^2 + 1236^2 .

It is a cyclic number.

It is not a de Polignac number, because 145872816457 - 2³ = 145872816449 is a prime.

It is a super-2 number, since 2×145872816457² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (145872811457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72936408228 + 72936408229.

It is an arithmetic number, because the mean of its divisors is an integer number (72936408229).

Almost surely, 2^145872816457 is an apocalyptic number.

It is an amenable number.

145872816457 is a deficient number, since it is larger than the sum of its proper divisors (1).

145872816457 is an equidigital number, since it uses as much as digits as its factorization.

145872816457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15052800, while the sum is 58.

The spelling of 145872816457 in words is "one hundred forty-five billion, eight hundred seventy-two million, eight hundred sixteen thousand, four hundred fifty-seven".