4547991644 has 36 divisors (see below), whose sum is σ = 9305487576. Its totient is φ = 1939228704.

The previous prime is 4547991619. The next prime is 4547991653. The reversal of 4547991644 is 4461997454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20282 + ... + 97505.

It is an arithmetic number, because the mean of its divisors is an integer number (258485766).

Almost surely, 2^4547991644 is an apocalyptic number.

It is an amenable number.

4547991644 is an abundant number, since it is smaller than the sum of its proper divisors (4757495932).

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

4547991644 is a wasteful number, since it uses less digits than its factorization.

4547991644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118002 (or 117993 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 53.

The square root of 4547991644 is about 67438.7992479107. The cubic root of 4547991644 is about 1656.8119540196.

The spelling of 4547991644 in words is "four billion, five hundred forty-seven million, nine hundred ninety-one thousand, six hundred forty-four".