73903720734 has 88 divisors (see below), whose sum is σ = 170349262272. Its totient is φ = 24032155680.

The previous prime is 73903720717. The next prime is 73903720757. The reversal of 73903720734 is 43702730937.

It is a super-2 number, since 2×73903720734² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73903720734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 4834387 + ... + 4849649.

Almost surely, 2^73903720734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73903720734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85174631136).

73903720734 is an abundant number, since it is smaller than the sum of its proper divisors (96445541538).

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

73903720734 is an equidigital number, since it uses as much as digits as its factorization.

73903720734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15336 (or 15309 counting only the distinct ones).

The product of its (nonzero) digits is 666792, while the sum is 45.

The spelling of 73903720734 in words is "seventy-three billion, nine hundred three million, seven hundred twenty thousand, seven hundred thirty-four".