355121142440 has 16 divisors (see below), whose sum is σ = 799022570580. Its totient is φ = 142048456960.

The previous prime is 355121142419. The next prime is 355121142559. The reversal of 355121142440 is 44241121553.

It can be written as a sum of positive squares in 2 ways, for example, as 341871751204 + 13249391236 = 584698^2 + 115106^2 .

It is a super-2 number, since 2×355121142440² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 355121142397 and 355121142406.

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, 4439014241 + ... + 4439014320.

Almost surely, 2^355121142440 is an apocalyptic number.

It is an amenable number.

355121142440 is an abundant number, since it is smaller than the sum of its proper divisors (443901428140).

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

355121142440 is a wasteful number, since it uses less digits than its factorization.

355121142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8878028572 (or 8878028568 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 355121142440 its reverse (44241121553), we get a palindrome (399362263993).

The spelling of 355121142440 in words is "three hundred fifty-five billion, one hundred twenty-one million, one hundred forty-two thousand, four hundred forty".