6451672616 has 16 divisors (see below), whose sum is σ = 12325130100. Its totient is φ = 3164971264.

The previous prime is 6451672603. The next prime is 6451672651. The reversal of 6451672616 is 6162761546.

It can be written as a sum of positive squares in 2 ways, for example, as 6433644100 + 18028516 = 80210^2 + 4246^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7607681 + ... + 7608528.

Almost surely, 2^6451672616 is an apocalyptic number.

It is an amenable number.

6451672616 is a deficient number, since it is larger than the sum of its proper divisors (5873457484).

6451672616 is a wasteful number, since it uses less digits than its factorization.

6451672616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15216268 (or 15216264 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 6451672616 is about 80322.3045984115. The cubic root of 6451672616 is about 1861.6188757779.

The spelling of 6451672616 in words is "six billion, four hundred fifty-one million, six hundred seventy-two thousand, six hundred sixteen".