4791901638 has 16 divisors (see below), whose sum is σ = 9787714560. Its totient is φ = 1563315336.

The previous prime is 4791901607. The next prime is 4791901649. The reversal of 4791901638 is 8361091974.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8495998 + ... + 8496561.

It is an arithmetic number, because the mean of its divisors is an integer number (611732160).

Almost surely, 2^4791901638 is an apocalyptic number.

4791901638 is an abundant number, since it is smaller than the sum of its proper divisors (4995812922).

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

4791901638 is a wasteful number, since it uses less digits than its factorization.

4791901638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16992611.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 4791901638 is about 69223.5627369756. The cubic root of 4791901638 is about 1685.9161267164.

The spelling of 4791901638 in words is "four billion, seven hundred ninety-one million, nine hundred one thousand, six hundred thirty-eight".