73531132520 has 32 divisors (see below), whose sum is σ = 165646149120. Its totient is φ = 29376701760.

The previous prime is 73531132517. The next prime is 73531132541. The reversal of 73531132520 is 2523113537.

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, 1083896 + ... + 1149735.

It is an arithmetic number, because the mean of its divisors is an integer number (5176442160).

Almost surely, 2^73531132520 is an apocalyptic number.

It is an amenable number.

73531132520 is an abundant number, since it is smaller than the sum of its proper divisors (92115016600).

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

73531132520 is a wasteful number, since it uses less digits than its factorization.

73531132520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234465 (or 2234461 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 32.

The spelling of 73531132520 in words is "seventy-three billion, five hundred thirty-one million, one hundred thirty-two thousand, five hundred twenty".