73473541920 has 72 divisors (see below), whose sum is σ = 250728466716. Its totient is φ = 19592944128.

The previous prime is 73473541877. The next prime is 73473541991. The reversal of 73473541920 is 2914537437.

73473541920 is a `hidden beast` number, since 7 + 34 + 73 + 541 + 9 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 66867753744 + 6605788176 = 258588^2 + 81276^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×73473541920² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25510207 + ... + 25513086.

Almost surely, 2^73473541920 is an apocalyptic number.

It is an amenable number.

73473541920 is an abundant number, since it is smaller than the sum of its proper divisors (177254924796).

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

73473541920 is a wasteful number, since it uses less digits than its factorization.

73473541920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51023314 (or 51023303 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The spelling of 73473541920 in words is "seventy-three billion, four hundred seventy-three million, five hundred forty-one thousand, nine hundred twenty".