355341215661 has 16 divisors (see below), whose sum is σ = 474944959488. Its totient is φ = 236316510000.

The previous prime is 355341215657. The next prime is 355341215707. The reversal of 355341215661 is 166512143553.

It is a happy number.

It is not a de Polignac number, because 355341215661 - 2² = 355341215657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355341215461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1956526 + ... + 2130416.

It is an arithmetic number, because the mean of its divisors is an integer number (29684059968).

Almost surely, 2^355341215661 is an apocalyptic number.

It is an amenable number.

355341215661 is a deficient number, since it is larger than the sum of its proper divisors (119603743827).

355341215661 is a wasteful number, since it uses less digits than its factorization.

355341215661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175552.

The product of its digits is 324000, while the sum is 42.

The spelling of 355341215661 in words is "three hundred fifty-five billion, three hundred forty-one million, two hundred fifteen thousand, six hundred sixty-one".