4978733643 has 12 divisors (see below), whose sum is σ = 7744696960. Its totient is φ = 3063836016.

The previous prime is 4978733623. The next prime is 4978733657. The reversal of 4978733643 is 3463378794.

It is a happy number.

4978733643 is a `hidden beast` number, since 497 + 87 + 3 + 36 + 43 = 666.

It is not a de Polignac number, because 4978733643 - 2⁹ = 4978733131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4978733643.

It is not an unprimeable number, because it can be changed into a prime (4978733623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21276523 + ... + 21276756.

Almost surely, 2^4978733643 is an apocalyptic number.

4978733643 is a deficient number, since it is larger than the sum of its proper divisors (2765963317).

4978733643 is a wasteful number, since it uses less digits than its factorization.

4978733643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42553298 (or 42553295 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 54.

The square root of 4978733643 is about 70560.1420279183. The cubic root of 4978733643 is about 1707.5481708237.

The spelling of 4978733643 in words is "four billion, nine hundred seventy-eight million, seven hundred thirty-three thousand, six hundred forty-three".