145421504040 has 128 divisors (see below), whose sum is σ = 474411893760. Its totient is φ = 35511496704.

The previous prime is 145421504017. The next prime is 145421504083. The reversal of 145421504040 is 40405124541.

It is a super-2 number, since 2×145421504040² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 145421503989 and 145421504007.

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 31 ways as a sum of consecutive naturals, for example, 887832 + ... + 1038791.

It is an arithmetic number, because the mean of its divisors is an integer number (3706342920).

Almost surely, 2^145421504040 is an apocalyptic number.

145421504040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145421504040 is an abundant number, since it is smaller than the sum of its proper divisors (328990389720).

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

145421504040 is a wasteful number, since it uses less digits than its factorization.

145421504040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1926691 (or 1926687 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 145421504040 its reverse (40405124541), we get a palindrome (185826628581).

The spelling of 145421504040 in words is "one hundred forty-five billion, four hundred twenty-one million, five hundred four thousand, forty".