1016655643 has 2 divisors, whose sum is σ = 1016655644. Its totient is φ = 1016655642.

The previous prime is 1016655631. The next prime is 1016655713. The reversal of 1016655643 is 3465566101.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1016655643 - 2⁵ = 1016655611 is a prime.

It is not a weakly prime, because it can be changed into another prime (1016655443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508327821 + 508327822.

It is an arithmetic number, because the mean of its divisors is an integer number (508327822).

Almost surely, 2^1016655643 is an apocalyptic number.

1016655643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1016655643 is an equidigital number, since it uses as much as digits as its factorization.

1016655643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 1016655643 is about 31885.0379174935. The cubic root of 1016655643 is about 1005.5213397015.

The spelling of 1016655643 in words is "one billion, sixteen million, six hundred fifty-five thousand, six hundred forty-three".