73918310640 has 160 divisors (see below), whose sum is σ = 248269038336. Its totient is φ = 18120560640.

The previous prime is 73918310591. The next prime is 73918310663. The reversal of 73918310640 is 4601381937.

It is a junction number, because it is equal to n+sod(n) for n = 73918310592 and 73918310601.

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, 35226 + ... + 386105.

Almost surely, 2^73918310640 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 73918310640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124134519168).

73918310640 is an abundant number, since it is smaller than the sum of its proper divisors (174350727696).

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

73918310640 is a wasteful number, since it uses less digits than its factorization.

73918310640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421407 (or 421401 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 42.

The spelling of 73918310640 in words is "seventy-three billion, nine hundred eighteen million, three hundred ten thousand, six hundred forty".