73404640437 has 16 divisors (see below), whose sum is σ = 103760589312. Its totient is φ = 46077888960.

The previous prime is 73404640429. The next prime is 73404640457.

73404640437 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 73404640437 - 2³ = 73404640429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73404640457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10662738 + ... + 10669619.

It is an arithmetic number, because the mean of its divisors is an integer number (6485036832).

Almost surely, 2^73404640437 is an apocalyptic number.

It is an amenable number.

73404640437 is a deficient number, since it is larger than the sum of its proper divisors (30355948875).

73404640437 is a wasteful number, since it uses less digits than its factorization.

73404640437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21332428.

The product of its (nonzero) digits is 677376, while the sum is 42.

The spelling of 73404640437 in words is "seventy-three billion, four hundred four million, six hundred forty thousand, four hundred thirty-seven".