72478329226 has 4 divisors (see below), whose sum is σ = 108717493842. Its totient is φ = 36239164612.

The previous prime is 72478329211. The next prime is 72478329239. The reversal of 72478329226 is 62292387427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62292387427 = 12799 ⋅4866973.

It can be written as a sum of positive squares in only one way, i.e., 55901509225 + 16576820001 = 236435^2 + 128751^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18119582305 + ... + 18119582308.

Almost surely, 2^72478329226 is an apocalyptic number.

72478329226 is a deficient number, since it is larger than the sum of its proper divisors (36239164616).

72478329226 is a wasteful number, since it uses less digits than its factorization.

72478329226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36239164615.

The product of its digits is 4064256, while the sum is 52.

The spelling of 72478329226 in words is "seventy-two billion, four hundred seventy-eight million, three hundred twenty-nine thousand, two hundred twenty-six".