73508531712 has 160 divisors (see below), whose sum is σ = 244153730304. Its totient is φ = 19093094400.

The previous prime is 73508531689. The next prime is 73508531713. The reversal of 73508531712 is 21713580537.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73508531713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192489 + ... + 429032.

Almost surely, 2^73508531712 is an apocalyptic number.

It is an amenable number.

73508531712 is an abundant number, since it is smaller than the sum of its proper divisors (170645198592).

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

73508531712 is a wasteful number, since it uses less digits than its factorization.

73508531712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621560 (or 621544 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 73508531712 in words is "seventy-three billion, five hundred eight million, five hundred thirty-one thousand, seven hundred twelve".