2001501671557 has 8 divisors (see below), whose sum is σ = 2006775482400. Its totient is φ = 1996228520784.

The previous prime is 2001501671501. The next prime is 2001501671573. The reversal of 2001501671557 is 7551761051002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001501671557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001501671657) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6233494 + ... + 6546712.

It is an arithmetic number, because the mean of its divisors is an integer number (250846935300).

Almost surely, 2^{2001501671557} is an apocalyptic number.

It is an amenable number.

2001501671557 is a deficient number, since it is larger than the sum of its proper divisors (5273810843).

2001501671557 is a wasteful number, since it uses less digits than its factorization.

2001501671557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330035.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 2001501671557 in words is "two trillion, one billion, five hundred one million, six hundred seventy-one thousand, five hundred fifty-seven".