201611355642 has 40 divisors (see below), whose sum is σ = 455207366592. Its totient is φ = 66690772200.

The previous prime is 201611355593. The next prime is 201611355643. The reversal of 201611355642 is 246553116102.

201611355642 is a `hidden beast` number, since 2 + 0 + 1 + 6 + 1 + 1 + 3 + 5 + 5 + 642 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 201611355597 and 201611355606.

It is not an unprimeable number, because it can be changed into a prime (201611355643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4728834 + ... + 4771277.

Almost surely, 2^201611355642 is an apocalyptic number.

201611355642 is an abundant number, since it is smaller than the sum of its proper divisors (253596010950).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201611355642 is a wasteful number, since it uses less digits than its factorization.

201611355642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9500256 (or 9500247 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 201611355642 in words is "two hundred one billion, six hundred eleven million, three hundred fifty-five thousand, six hundred forty-two".