145401255440 has 120 divisors (see below), whose sum is σ = 393536062080. Its totient is φ = 49815730944.

The previous prime is 145401255427. The next prime is 145401255443. The reversal of 145401255440 is 44552104541.

It is a super-2 number, since 2×145401255440² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 145401255440.

It is not an unprimeable number, because it can be changed into a prime (145401255443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5706569 + ... + 5731991.

It is an arithmetic number, because the mean of its divisors is an integer number (3279467184).

Almost surely, 2^145401255440 is an apocalyptic number.

145401255440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145401255440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196768031040).

145401255440 is an abundant number, since it is smaller than the sum of its proper divisors (248134806640).

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

145401255440 is a wasteful number, since it uses less digits than its factorization.

145401255440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26909 (or 26896 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 35.

Adding to 145401255440 its reverse (44552104541), we get a palindrome (189953359981).

The spelling of 145401255440 in words is "one hundred forty-five billion, four hundred one million, two hundred fifty-five thousand, four hundred forty".