145120440023442 has 24 divisors (see below), whose sum is σ = 338614360055244. Its totient is φ = 44652443084064.

The previous prime is 145120440023357. The next prime is 145120440023467. The reversal of 145120440023442 is 244320044021541.

145120440023442 is a `hidden beast` number, since 1 + 4 + 5 + 1 + 204 + 4 + 0 + 0 + 2 + 3 + 442 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 142087377441681 + 3033062581761 = 11920041^2 + 1741569^2 .

It is a super-2 number, since 2×145120440023442² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145120440023397 and 145120440023406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310086410073 + ... + 310086410540.

Almost surely, 2^{145120440023442} is an apocalyptic number.

145120440023442 is an abundant number, since it is smaller than the sum of its proper divisors (193493920031802).

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

145120440023442 is a wasteful number, since it uses less digits than its factorization.

145120440023442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620172820634 (or 620172820631 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 145120440023442 its reverse (244320044021541), we get a palindrome (389440484044983).

The spelling of 145120440023442 in words is "one hundred forty-five trillion, one hundred twenty billion, four hundred forty million, twenty-three thousand, four hundred forty-two".