747386449920 has 1872 divisors, whose sum is σ = 3132460670976. Its totient is φ = 164148019200.

The previous prime is 747386449891. The next prime is 747386449937. The reversal of 747386449920 is 29944683747.

747386449920 is a `hidden beast` number, since 7 + 47 + 3 + 86 + 4 + 499 + 20 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 15901839337 + ... + 15901839383.

It is an arithmetic number, because the mean of its divisors is an integer number (1673323008).

Almost surely, 2^747386449920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 747386449920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566230335488).

747386449920 is an abundant number, since it is smaller than the sum of its proper divisors (2385074221056).

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

747386449920 is a wasteful number, since it uses less digits than its factorization.

747386449920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 747386449920 in words is "seven hundred forty-seven billion, three hundred eighty-six million, four hundred forty-nine thousand, nine hundred twenty".