6311520872 has 8 divisors (see below), whose sum is σ = 11834101650. Its totient is φ = 3155760432.

The previous prime is 6311520841. The next prime is 6311520883. The reversal of 6311520872 is 2780251136.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5395490116 + 916030756 = 73454^2 + 30266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394470047 + ... + 394470062.

Almost surely, 2^6311520872 is an apocalyptic number.

It is an amenable number.

6311520872 is a deficient number, since it is larger than the sum of its proper divisors (5522580778).

6311520872 is a wasteful number, since it uses less digits than its factorization.

6311520872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788940115 (or 788940111 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 6311520872 is about 79445.0808546382. The cubic root of 6311520872 is about 1848.0398886026.

The spelling of 6311520872 in words is "six billion, three hundred eleven million, five hundred twenty thousand, eight hundred seventy-two".