2001756542 has 8 divisors (see below), whose sum is σ = 3003191256. Its totient is φ = 1000692792.

The previous prime is 2001756529. The next prime is 2001756553. The reversal of 2001756542 is 2456571002.

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

It is a junction number, because it is equal to n+sod(n) for n = 2001756499 and 2001756508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78833 + ... + 101084.

It is an arithmetic number, because the mean of its divisors is an integer number (375398907).

Almost surely, 2^2001756542 is an apocalyptic number.

2001756542 is a deficient number, since it is larger than the sum of its proper divisors (1001434714).

2001756542 is a wasteful number, since it uses less digits than its factorization.

2001756542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185482.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 2001756542 is about 44740.9939764418. The cubic root of 2001756542 is about 1260.2897926707.

The spelling of 2001756542 in words is "two billion, one million, seven hundred fifty-six thousand, five hundred forty-two".