2047991513391 has 32 divisors (see below), whose sum is σ = 3214533470400. Its totient is φ = 1284215178240.

The previous prime is 2047991513389. The next prime is 2047991513423. The reversal of 2047991513391 is 1933151997402.

2047991513391 is a `hidden beast` number, since 2 + 0 + 4 + 7 + 9 + 91 + 513 + 39 + 1 = 666.

It is not a de Polignac number, because 2047991513391 - 2¹ = 2047991513389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2047991513341) by changing a digit.

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 in 31 ways as a sum of consecutive naturals, for example, 648000 + ... + 2125061.

It is an arithmetic number, because the mean of its divisors is an integer number (100454170950).

Almost surely, 2^{2047991513391} is an apocalyptic number.

2047991513391 is a deficient number, since it is larger than the sum of its proper divisors (1166541957009).

2047991513391 is a wasteful number, since it uses less digits than its factorization.

2047991513391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774696 (or 2774690 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 2047991513391 in words is "two trillion, forty-seven billion, nine hundred ninety-one million, five hundred thirteen thousand, three hundred ninety-one".