145405223240 has 128 divisors (see below), whose sum is σ = 334752445440. Its totient is φ = 56831901696.

The previous prime is 145405223237. The next prime is 145405223269. The reversal of 145405223240 is 42322504541.

It is a super-2 number, since 2×145405223240² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145405223197 and 145405223206.

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, 239547017 + ... + 239547623.

It is an arithmetic number, because the mean of its divisors is an integer number (2615253480).

Almost surely, 2^145405223240 is an apocalyptic number.

145405223240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145405223240 is an abundant number, since it is smaller than the sum of its proper divisors (189347222200).

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

145405223240 is a wasteful number, since it uses less digits than its factorization.

145405223240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 145405223240 its reverse (42322504541), we get a palindrome (187727727781).

The spelling of 145405223240 in words is "one hundred forty-five billion, four hundred five million, two hundred twenty-three thousand, two hundred forty".