201894664258742 has 16 divisors (see below), whose sum is σ = 372728610939552. Its totient is φ = 79870416629760.

The previous prime is 201894664258741. The next prime is 201894664258757. The reversal of 201894664258742 is 247852466498102.

It is a super-2 number, since 2×201894664258742² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201894664258741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554655670859 + ... + 554655671222.

It is an arithmetic number, because the mean of its divisors is an integer number (23295538183722).

Almost surely, 2^{201894664258742} is an apocalyptic number.

201894664258742 is a deficient number, since it is larger than the sum of its proper divisors (170833946680810).

201894664258742 is a wasteful number, since it uses less digits than its factorization.

201894664258742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109311342103.

The product of its (nonzero) digits is 371589120, while the sum is 68.

The spelling of 201894664258742 in words is "two hundred one trillion, eight hundred ninety-four billion, six hundred sixty-four million, two hundred fifty-eight thousand, seven hundred forty-two".