155530335024440 has 16 divisors (see below), whose sum is σ = 349943253805080. Its totient is φ = 62212134009760.

The previous prime is 155530335024439. The next prime is 155530335024499. The reversal of 155530335024440 is 44420533035551.

It is a super-2 number, since 2×155530335024440² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155530335024391 and 155530335024400.

It is a congruent number.

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, 1944129187766 + ... + 1944129187845.

Almost surely, 2^{155530335024440} is an apocalyptic number.

155530335024440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155530335024440 is an abundant number, since it is smaller than the sum of its proper divisors (194412918780640).

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

155530335024440 is a wasteful number, since it uses less digits than its factorization.

155530335024440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3888258375622 (or 3888258375618 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 44.

Adding to 155530335024440 its reverse (44420533035551), we get a palindrome (199950868059991).

The spelling of 155530335024440 in words is "one hundred fifty-five trillion, five hundred thirty billion, three hundred thirty-five million, twenty-four thousand, four hundred forty".