4951813644 has 72 divisors (see below), whose sum is σ = 12935744640. Its totient is φ = 1595520000.

The previous prime is 4951813631. The next prime is 4951813661. The reversal of 4951813644 is 4463181594.

It is a self number, because there is not a number n which added to its sum of digits gives 4951813644.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1235644 + ... + 1239644.

It is an arithmetic number, because the mean of its divisors is an integer number (179663120).

Almost surely, 2^4951813644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4951813644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6467872320).

4951813644 is an abundant number, since it is smaller than the sum of its proper divisors (7983930996).

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

4951813644 is a wasteful number, since it uses less digits than its factorization.

4951813644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151 (or 5146 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 4951813644 is about 70369.1242236252. The cubic root of 4951813644 is about 1704.4650378904.

The spelling of 4951813644 in words is "four billion, nine hundred fifty-one million, eight hundred thirteen thousand, six hundred forty-four".