73442637040 has 40 divisors (see below), whose sum is σ = 180798495120. Its totient is φ = 27648992256.

The previous prime is 73442637019. The next prime is 73442637089. The reversal of 73442637040 is 4073624437.

It is a tau number, because it is divible by the number of its divisors (40).

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

It is a junction number, because it is equal to n+sod(n) for n = 73442636984 and 73442637002.

It is a congruent number.

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, 26999610 + ... + 27002329.

It is an arithmetic number, because the mean of its divisors is an integer number (4519962378).

Almost surely, 2^73442637040 is an apocalyptic number.

It is an amenable number.

73442637040 is an abundant number, since it is smaller than the sum of its proper divisors (107355858080).

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

73442637040 is a wasteful number, since it uses less digits than its factorization.

73442637040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54001969 (or 54001963 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 40.

The spelling of 73442637040 in words is "seventy-three billion, four hundred forty-two million, six hundred thirty-seven thousand, forty".