355640641 has 4 divisors (see below), whose sum is σ = 359925552. Its totient is φ = 351355732.

The previous prime is 355640627. The next prime is 355640657. The reversal of 355640641 is 146046553.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146046553 = 503 ⋅290351.

It is a cyclic number.

It is not a de Polignac number, because 355640641 - 2⁵ = 355640609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 355640597 and 355640606.

It is not an unprimeable number, because it can be changed into a prime (355640741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2142331 + ... + 2142496.

It is an arithmetic number, because the mean of its divisors is an integer number (89981388).

Almost surely, 2^355640641 is an apocalyptic number.

It is an amenable number.

355640641 is a deficient number, since it is larger than the sum of its proper divisors (4284911).

355640641 is an equidigital number, since it uses as much as digits as its factorization.

355640641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4284910.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 355640641 is about 18858.4368652336. The cubic root of 355640641 is about 708.4955521000.

The spelling of 355640641 in words is "three hundred fifty-five million, six hundred forty thousand, six hundred forty-one".