73234812640 has 96 divisors (see below), whose sum is σ = 189578600064. Its totient is φ = 26513379840.

The previous prime is 73234812619. The next prime is 73234812671. The reversal of 73234812640 is 4621843237.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 73234812593 and 73234812602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307867 + ... + 491173.

It is an arithmetic number, because the mean of its divisors is an integer number (1974777084).

Almost surely, 2^73234812640 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 73234812640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94789300032).

73234812640 is an abundant number, since it is smaller than the sum of its proper divisors (116343787424).

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

73234812640 is a wasteful number, since it uses less digits than its factorization.

73234812640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183560 (or 183552 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 73234812640 in words is "seventy-three billion, two hundred thirty-four million, eight hundred twelve thousand, six hundred forty".