145451313440 has 24 divisors (see below), whose sum is σ = 343628728380. Its totient is φ = 58180525312.

The previous prime is 145451313407. The next prime is 145451313463. The reversal of 145451313440 is 44313154541.

It can be written as a sum of positive squares in 2 ways, for example, as 144245001616 + 1206311824 = 379796^2 + 34732^2 .

It is a super-2 number, since 2×145451313440² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 145451313440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454535195 + ... + 454535514.

Almost surely, 2^145451313440 is an apocalyptic number.

145451313440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145451313440 is an abundant number, since it is smaller than the sum of its proper divisors (198177414940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145451313440 is an equidigital number, since it uses as much as digits as its factorization.

145451313440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909070724 (or 909070716 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 145451313440 its reverse (44313154541), we get a palindrome (189764467981).

The spelling of 145451313440 in words is "one hundred forty-five billion, four hundred fifty-one million, three hundred thirteen thousand, four hundred forty".