4948639566 has 128 divisors (see below), whose sum is σ = 11996328960. Its totient is φ = 1345766400.

The previous prime is 4948639561. The next prime is 4948639601. The reversal of 4948639566 is 6659368494.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4948639561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1395756 + ... + 1399296.

It is an arithmetic number, because the mean of its divisors is an integer number (93721320).

Almost surely, 2^4948639566 is an apocalyptic number.

4948639566 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 4948639566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5998164480).

4948639566 is an abundant number, since it is smaller than the sum of its proper divisors (7047689394).

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

4948639566 is a wasteful number, since it uses less digits than its factorization.

4948639566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642.

The product of its digits is 33592320, while the sum is 60.

The square root of 4948639566 is about 70346.5675495258. The cubic root of 4948639566 is about 1704.1007766502.

The spelling of 4948639566 in words is "four billion, nine hundred forty-eight million, six hundred thirty-nine thousand, five hundred sixty-six".