5151644646 has 8 divisors (see below), whose sum is σ = 10303289304. Its totient is φ = 1717214880.

The previous prime is 5151644639. The next prime is 5151644671. The reversal of 5151644646 is 6464461515.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

5151644646 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 5151644598 and 5151644607.

It is a congruent number.

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, 429303715 + ... + 429303726.

It is an arithmetic number, because the mean of its divisors is an integer number (1287911163).

Almost surely, 2^5151644646 is an apocalyptic number.

5151644646 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.

5151644646 is a wasteful number, since it uses less digits than its factorization.

5151644646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858607446.

The product of its digits is 345600, while the sum is 42.

The square root of 5151644646 is about 71774.9583489952. The cubic root of 5151644646 is about 1727.0913117471.

The spelling of 5151644646 in words is "five billion, one hundred fifty-one million, six hundred forty-four thousand, six hundred forty-six".