201656630611 has 16 divisors (see below), whose sum is σ = 206742987360. Its totient is φ = 196619304960.

The previous prime is 201656630599. The next prime is 201656630647. The reversal of 201656630611 is 116036656102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201656630611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201656630111) 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, 15140691 + ... + 15154003.

It is an arithmetic number, because the mean of its divisors is an integer number (12921436710).

Almost surely, 2^201656630611 is an apocalyptic number.

201656630611 is a deficient number, since it is larger than the sum of its proper divisors (5086356749).

201656630611 is a wasteful number, since it uses less digits than its factorization.

201656630611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15126.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 201656630611 in words is "two hundred one billion, six hundred fifty-six million, six hundred thirty thousand, six hundred eleven".