73475421678 has 64 divisors (see below), whose sum is σ = 165378104640. Its totient is φ = 24178176000.

The previous prime is 73475421667. The next prime is 73475421703. The reversal of 73475421678 is 87612457437.

73475421678 is a `hidden beast` number, since 7 + 3 + 475 + 4 + 2 + 167 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2082948 + ... + 2117928.

It is an arithmetic number, because the mean of its divisors is an integer number (2584032885).

Almost surely, 2^73475421678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73475421678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82689052320).

73475421678 is an abundant number, since it is smaller than the sum of its proper divisors (91902682962).

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

73475421678 is a wasteful number, since it uses less digits than its factorization.

73475421678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35490 (or 35484 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 54.

The spelling of 73475421678 in words is "seventy-three billion, four hundred seventy-five million, four hundred twenty-one thousand, six hundred seventy-eight".