6521791001 has 8 divisors (see below), whose sum is σ = 7115988864. Its totient is φ = 5927811120.

The previous prime is 6521790973. The next prime is 6521791007. The reversal of 6521791001 is 1001971256.

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

It is not a de Polignac number, because 6521791001 - 2²⁶ = 6454682137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6521791007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11555 + ... + 114791.

It is an arithmetic number, because the mean of its divisors is an integer number (889498608).

Almost surely, 2^6521791001 is an apocalyptic number.

It is an amenable number.

6521791001 is a deficient number, since it is larger than the sum of its proper divisors (594197863).

6521791001 is a wasteful number, since it uses less digits than its factorization.

6521791001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108991.

The product of its (nonzero) digits is 3780, while the sum is 32.

The square root of 6521791001 is about 80757.6064590822. The cubic root of 6521791001 is about 1868.3387689794.

The spelling of 6521791001 in words is "six billion, five hundred twenty-one million, seven hundred ninety-one thousand, one".