6521225423972 has 12 divisors (see below), whose sum is σ = 13042450848000. Its totient is φ = 2794810895976.

The previous prime is 6521225423957. The next prime is 6521225423983. The reversal of 6521225423972 is 2793245221256.

It is a happy number.

6521225423972 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 6521225423972.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 116450453972 + ... + 116450454027.

It is an arithmetic number, because the mean of its divisors is an integer number (1086870904000).

Almost surely, 2^{6521225423972} is an apocalyptic number.

It is an amenable number.

6521225423972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6521225423972 is a wasteful number, since it uses less digits than its factorization.

6521225423972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232900908010 (or 232900908008 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 6521225423972 in words is "six trillion, five hundred twenty-one billion, two hundred twenty-five million, four hundred twenty-three thousand, nine hundred seventy-two".