145331442440 has 16 divisors (see below), whose sum is σ = 326995745580. Its totient is φ = 58132576960.

The previous prime is 145331442439. The next prime is 145331442467. The reversal of 145331442440 is 44244133541.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 137936474404 + 7394968036 = 371398^2 + 85994^2 .

It is a super-2 number, since 2×145331442440² (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 145331442440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1816642991 + ... + 1816643070.

Almost surely, 2^145331442440 is an apocalyptic number.

145331442440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145331442440 is an abundant number, since it is smaller than the sum of its proper divisors (181664303140).

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

145331442440 is a wasteful number, since it uses less digits than its factorization.

145331442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633286072 (or 3633286068 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 35.

Adding to 145331442440 its reverse (44244133541), we get a palindrome (189575575981).

The spelling of 145331442440 in words is "one hundred forty-five billion, three hundred thirty-one million, four hundred forty-two thousand, four hundred forty".