345531511434440 has 32 divisors (see below), whose sum is σ = 777448698507000. Its totient is φ = 138212107190784.

The previous prime is 345531511434427. The next prime is 345531511434457. The reversal of 345531511434440 is 44434115135543.

It can be written as a sum of positive squares in 4 ways, for example, as 268404720495844 + 77126790938596 = 16383062^2 + 8782186^2 .

It is a super-2 number, since 2×345531511434440² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4186655 + ... + 26619374.

Almost surely, 2^{345531511434440} is an apocalyptic number.

It is an amenable number.

345531511434440 is an abundant number, since it is smaller than the sum of its proper divisors (431917187072560).

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

345531511434440 is a wasteful number, since it uses less digits than its factorization.

345531511434440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31086449 (or 31086445 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 47.

Adding to 345531511434440 its reverse (44434115135543), we get a palindrome (389965626569983).

The spelling of 345531511434440 in words is "three hundred forty-five trillion, five hundred thirty-one billion, five hundred eleven million, four hundred thirty-four thousand, four hundred forty".