73742454566520 has 256 divisors, whose sum is σ = 224504249149440. Its totient is φ = 19375548530688.

The previous prime is 73742454566519. The next prime is 73742454566591. The reversal of 73742454566520 is 2566545424737.

It is a happy number.

It is a super-2 number, since 2×73742454566520² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2028492664 + ... + 2028529016.

It is an arithmetic number, because the mean of its divisors is an integer number (876969723240).

Almost surely, 2^{73742454566520} 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 73742454566520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112252124574720).

73742454566520 is an abundant number, since it is smaller than the sum of its proper divisors (150761794582920).

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

73742454566520 is a wasteful number, since it uses less digits than its factorization.

73742454566520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37294 (or 37290 counting only the distinct ones).

The product of its (nonzero) digits is 169344000, while the sum is 60.

The spelling of 73742454566520 in words is "seventy-three trillion, seven hundred forty-two billion, four hundred fifty-four million, five hundred sixty-six thousand, five hundred twenty".