2001756671374 has 4 divisors (see below), whose sum is σ = 3002635007064. Its totient is φ = 1000878335686.

The previous prime is 2001756671351. The next prime is 2001756671389. The reversal of 2001756671374 is 4731766571002.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 500439167842 + ... + 500439167845.

It is an arithmetic number, because the mean of its divisors is an integer number (750658751766).

Almost surely, 2^{2001756671374} is an apocalyptic number.

2001756671374 is a deficient number, since it is larger than the sum of its proper divisors (1000878335690).

2001756671374 is a wasteful number, since it uses less digits than its factorization.

2001756671374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000878335689.

The product of its (nonzero) digits is 1481760, while the sum is 49.

The spelling of 2001756671374 in words is "two trillion, one billion, seven hundred fifty-six million, six hundred seventy-one thousand, three hundred seventy-four".