73756665738 has 96 divisors (see below), whose sum is σ = 185502949632. Its totient is φ = 20743430400.

The previous prime is 73756665737. The next prime is 73756665739. The reversal of 73756665738 is 83756665737.

It is an interprime number because it is at equal distance from previous prime (73756665737) and next prime (73756665739).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (73756665737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5907070 + ... + 5919542.

It is an arithmetic number, because the mean of its divisors is an integer number (1932322392).

Almost surely, 2^73756665738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73756665738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92751474816).

73756665738 is an abundant number, since it is smaller than the sum of its proper divisors (111746283894).

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

73756665738 is a wasteful number, since it uses less digits than its factorization.

73756665738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13220 (or 13217 counting only the distinct ones).

The product of its digits is 133358400, while the sum is 63.

Subtracting 73756665738 from its reverse (83756665737), we obtain a palindrome (9999999999).

The spelling of 73756665738 in words is "seventy-three billion, seven hundred fifty-six million, six hundred sixty-five thousand, seven hundred thirty-eight".