73640406126238 has 16 divisors (see below), whose sum is σ = 126240818905440. Its totient is φ = 31560143381856.

The previous prime is 73640406126211. The next prime is 73640406126257. The reversal of 73640406126238 is 83262160404637.

It is a happy number.

It is a super-2 number, since 2×73640406126238² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18144948 + ... + 21829336.

It is an arithmetic number, because the mean of its divisors is an integer number (7890051181590).

Almost surely, 2^{73640406126238} is an apocalyptic number.

73640406126238 is a deficient number, since it is larger than the sum of its proper divisors (52600412779202).

73640406126238 is a wasteful number, since it uses less digits than its factorization.

73640406126238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112051.

The product of its (nonzero) digits is 6967296, while the sum is 52.

The spelling of 73640406126238 in words is "seventy-three trillion, six hundred forty billion, four hundred six million, one hundred twenty-six thousand, two hundred thirty-eight".