6491001438532 has 24 divisors (see below), whose sum is σ = 12233194646400. Its totient is φ = 2995809232416.

The previous prime is 6491001438497. The next prime is 6491001438539. The reversal of 6491001438532 is 2358341001946.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6491001438539) 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, 3639519 + ... + 5121337.

It is an arithmetic number, because the mean of its divisors is an integer number (509716443600).

Almost surely, 2^{6491001438532} is an apocalyptic number.

It is an amenable number.

6491001438532 is a deficient number, since it is larger than the sum of its proper divisors (5742193207868).

6491001438532 is a wasteful number, since it uses less digits than its factorization.

6491001438532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566075 (or 1566073 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 6491001438532 in words is "six trillion, four hundred ninety-one billion, one million, four hundred thirty-eight thousand, five hundred thirty-two".