73703743440 has 160 divisors (see below), whose sum is σ = 242177713920. Its totient is φ = 18478620672.

The previous prime is 73703743381. The next prime is 73703743453. The reversal of 73703743440 is 4434730737.

It is a junction number, because it is equal to n+sod(n) for n = 73703743392 and 73703743401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4058701 + ... + 4076819.

It is an arithmetic number, because the mean of its divisors is an integer number (1513610712).

Almost surely, 2^73703743440 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 73703743440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121088856960).

73703743440 is an abundant number, since it is smaller than the sum of its proper divisors (168473970480).

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

73703743440 is a wasteful number, since it uses less digits than its factorization.

73703743440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19149 (or 19143 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 42.

The spelling of 73703743440 in words is "seventy-three billion, seven hundred three million, seven hundred forty-three thousand, four hundred forty".