73985522545 has 8 divisors (see below), whose sum is σ = 96853775040. Its totient is φ = 53807652720.

The previous prime is 73985522543. The next prime is 73985522551. The reversal of 73985522545 is 54522558937.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73985522545 - 2¹ = 73985522543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55), and also a Moran number because the ratio is a prime number: 1345191319 = 73985522545 / (7 + 3 + 9 + 8 + 5 + 5 + 2 + 2 + 5 + 4 + 5).

It is not an unprimeable number, because it can be changed into a prime (73985522543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672595605 + ... + 672595714.

It is an arithmetic number, because the mean of its divisors is an integer number (12106721880).

Almost surely, 2^73985522545 is an apocalyptic number.

It is an amenable number.

73985522545 is a deficient number, since it is larger than the sum of its proper divisors (22868252495).

73985522545 is a wasteful number, since it uses less digits than its factorization.

73985522545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345191335.

The product of its digits is 15120000, while the sum is 55.

The spelling of 73985522545 in words is "seventy-three billion, nine hundred eighty-five million, five hundred twenty-two thousand, five hundred forty-five".