6721501156 has 12 divisors (see below), whose sum is σ = 11766864060. Its totient is φ = 3359540000.

The previous prime is 6721501133. The next prime is 6721501229. The reversal of 6721501156 is 6511051276.

It can be written as a sum of positive squares in 2 ways, for example, as 2949576100 + 3771925056 = 54310^2 + 61416^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290095 + ... + 312406.

It is an arithmetic number, because the mean of its divisors is an integer number (980572005).

Almost surely, 2^6721501156 is an apocalyptic number.

It is an amenable number.

6721501156 is a deficient number, since it is larger than the sum of its proper divisors (5045362904).

6721501156 is a wasteful number, since it uses less digits than its factorization.

6721501156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605294 (or 605292 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 6721501156 is about 81984.7617304582. The cubic root of 6721501156 is about 1887.2180974312.

The spelling of 6721501156 in words is "six billion, seven hundred twenty-one million, five hundred one thousand, one hundred fifty-six".