73400740736 has 64 divisors (see below), whose sum is σ = 151018344000. Its totient is φ = 35515662336.

The previous prime is 73400740733. The next prime is 73400740793. The reversal of 73400740736 is 63704700437.

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

It is a junction number, because it is equal to n+sod(n) for n = 73400740693 and 73400740702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73400740733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 466880 + ... + 603968.

It is an arithmetic number, because the mean of its divisors is an integer number (2359661625).

Almost surely, 2^73400740736 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 73400740736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75509172000).

73400740736 is an abundant number, since it is smaller than the sum of its proper divisors (77617603264).

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

73400740736 is a wasteful number, since it uses less digits than its factorization.

73400740736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137239 (or 137227 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 41.

The spelling of 73400740736 in words is "seventy-three billion, four hundred million, seven hundred forty thousand, seven hundred thirty-six".