3656642043 has 8 divisors (see below), whose sum is σ = 4876182288. Its totient is φ = 2437431584.

The previous prime is 3656642029. The next prime is 3656642069. The reversal of 3656642043 is 3402466563.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3656642043 - 2¹² = 3656637947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3656641992 and 3656642010.

It is not an unprimeable number, because it can be changed into a prime (3656642023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55296 + ... + 101837.

It is an arithmetic number, because the mean of its divisors is an integer number (609522786).

Almost surely, 2^3656642043 is an apocalyptic number.

3656642043 is a deficient number, since it is larger than the sum of its proper divisors (1219540245).

3656642043 is a wasteful number, since it uses less digits than its factorization.

3656642043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164893.

The product of its (nonzero) digits is 311040, while the sum is 39.

The square root of 3656642043 is about 60470.1748219732. The cubic root of 3656642043 is about 1540.6150973765.

The spelling of 3656642043 in words is "three billion, six hundred fifty-six million, six hundred forty-two thousand, forty-three".