73475131720 has 32 divisors (see below), whose sum is σ = 168438278520. Its totient is φ = 28835522560.

The previous prime is 73475131687. The next prime is 73475131739. The reversal of 73475131720 is 2713157437.

It can be written as a sum of positive squares in 4 ways, for example, as 72263117124 + 1212014596 = 268818^2 + 34814^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17326921 + ... + 17331160.

Almost surely, 2^73475131720 is an apocalyptic number.

It is an amenable number.

73475131720 is an abundant number, since it is smaller than the sum of its proper divisors (94963146800).

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

73475131720 is a wasteful number, since it uses less digits than its factorization.

73475131720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34658145 (or 34658141 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 40.

The spelling of 73475131720 in words is "seventy-three billion, four hundred seventy-five million, one hundred thirty-one thousand, seven hundred twenty".