4978649646 has 48 divisors (see below), whose sum is σ = 11316296160. Its totient is φ = 1579744320.

The previous prime is 4978649623. The next prime is 4978649647. The reversal of 4978649646 is 6469468794.

4978649646 is a `hidden beast` number, since 497 + 86 + 4 + 9 + 64 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978649647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30105 + ... + 104228.

It is an arithmetic number, because the mean of its divisors is an integer number (235756170).

Almost surely, 2^4978649646 is an apocalyptic number.

4978649646 is an abundant number, since it is smaller than the sum of its proper divisors (6337646514).

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

4978649646 is a wasteful number, since it uses less digits than its factorization.

4978649646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134441 (or 134438 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The square root of 4978649646 is about 70559.5468097691. The cubic root of 4978649646 is about 1707.5385679983.

The spelling of 4978649646 in words is "four billion, nine hundred seventy-eight million, six hundred forty-nine thousand, six hundred forty-six".