4978496640 has 384 divisors, whose sum is σ = 17516174400. Its totient is φ = 1201913856.

The previous prime is 4978496617. The next prime is 4978496651. The reversal of 4978496640 is 466948794.

It is a tau number, because it is divible by the number of its divisors (384).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21740046 + ... + 21740274.

Almost surely, 2^4978496640 is an apocalyptic number.

4978496640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4978496640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8758087200).

4978496640 is an abundant number, since it is smaller than the sum of its proper divisors (12537677760).

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

4978496640 is a wasteful number, since it uses less digits than its factorization.

4978496640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 57.

The square root of 4978496640 is about 70558.4625682845. The cubic root of 4978496640 is about 1707.5210755494.

The spelling of 4978496640 in words is "four billion, nine hundred seventy-eight million, four hundred ninety-six thousand, six hundred forty".