2001928571497 has 2 divisors, whose sum is σ = 2001928571498. Its totient is φ = 2001928571496.

The previous prime is 2001928571491. The next prime is 2001928571543. The reversal of 2001928571497 is 7941758291002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1337860042281 + 664068529216 = 1156659^2 + 814904^2 .

It is a cyclic number.

It is not a de Polignac number, because 2001928571497 - 2¹¹ = 2001928569449 is a prime.

It is not a weakly prime, because it can be changed into another prime (2001928571491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000964285748 + 1000964285749.

It is an arithmetic number, because the mean of its divisors is an integer number (1000964285749).

Almost surely, 2^{2001928571497} is an apocalyptic number.

It is an amenable number.

2001928571497 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001928571497 is an equidigital number, since it uses as much as digits as its factorization.

2001928571497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 2001928571497 in words is "two trillion, one billion, nine hundred twenty-eight million, five hundred seventy-one thousand, four hundred ninety-seven".