357043609661 has 4 divisors (see below), whose sum is σ = 369355458300. Its totient is φ = 344731761024.

The previous prime is 357043609609. The next prime is 357043609667. The reversal of 357043609661 is 166906340753.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166906340753 = 503 ⋅331821751.

It can be written as a sum of positive squares in 2 ways, for example, as 158189152900 + 198854456761 = 397730^2 + 445931^2 .

It is a cyclic number.

It is not a de Polignac number, because 357043609661 - 2¹⁰ = 357043608637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (357043609667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6155924276 + ... + 6155924333.

It is an arithmetic number, because the mean of its divisors is an integer number (92338864575).

Almost surely, 2^357043609661 is an apocalyptic number.

It is an amenable number.

357043609661 is a deficient number, since it is larger than the sum of its proper divisors (12311848639).

357043609661 is a wasteful number, since it uses less digits than its factorization.

357043609661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311848638.

The product of its (nonzero) digits is 2449440, while the sum is 50.

The spelling of 357043609661 in words is "three hundred fifty-seven billion, forty-three million, six hundred nine thousand, six hundred sixty-one".