72443349554 has 4 divisors (see below), whose sum is σ = 108665024334. Its totient is φ = 36221674776.

The previous prime is 72443349499. The next prime is 72443349569. The reversal of 72443349554 is 45594334427.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 62761773529 + 9681576025 = 250523^2 + 98395^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18110837387 + ... + 18110837390.

Almost surely, 2^72443349554 is an apocalyptic number.

72443349554 is a deficient number, since it is larger than the sum of its proper divisors (36221674780).

72443349554 is a wasteful number, since it uses less digits than its factorization.

72443349554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36221674779.

The product of its digits is 7257600, while the sum is 50.

The spelling of 72443349554 in words is "seventy-two billion, four hundred forty-three million, three hundred forty-nine thousand, five hundred fifty-four".