6521452990 has 32 divisors (see below), whose sum is σ = 12660429600. Its totient is φ = 2404331904.

The previous prime is 6521452979. The next prime is 6521453023. The reversal of 6521452990 is 992541256.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50961 + ... + 125059.

It is an arithmetic number, because the mean of its divisors is an integer number (395638425).

Almost surely, 2^6521452990 is an apocalyptic number.

6521452990 is a deficient number, since it is larger than the sum of its proper divisors (6138976610).

6521452990 is a wasteful number, since it uses less digits than its factorization.

6521452990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74796.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 6521452990 is about 80755.5136817295. The cubic root of 6521452990 is about 1868.3064910378.

The spelling of 6521452990 in words is "six billion, five hundred twenty-one million, four hundred fifty-two thousand, nine hundred ninety".