73778330752 has 64 divisors (see below), whose sum is σ = 170731304640. Its totient is φ = 31100912640.

The previous prime is 73778330737. The next prime is 73778330761. The reversal of 73778330752 is 25703387737.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 73778330752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620278 + ... + 729589.

It is an arithmetic number, because the mean of its divisors is an integer number (2667676635).

Almost surely, 2^73778330752 is an apocalyptic number.

It is an amenable number.

73778330752 is an abundant number, since it is smaller than the sum of its proper divisors (96952973888).

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

73778330752 is a wasteful number, since it uses less digits than its factorization.

73778330752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349949 (or 1349937 counting only the distinct ones).

The product of its (nonzero) digits is 5186160, while the sum is 52.

The spelling of 73778330752 in words is "seventy-three billion, seven hundred seventy-eight million, three hundred thirty thousand, seven hundred fifty-two".