72418545746 has 4 divisors (see below), whose sum is σ = 108627818622. Its totient is φ = 36209272872.

The previous prime is 72418545743. The next prime is 72418545763. The reversal of 72418545746 is 64754581427.

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: 64754581427 = 1811 ⋅35756257.

It can be written as a sum of positive squares in only one way, i.e., 44125623721 + 28292922025 = 210061^2 + 168205^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72418545743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18104636435 + ... + 18104636438.

Almost surely, 2^72418545746 is an apocalyptic number.

72418545746 is a deficient number, since it is larger than the sum of its proper divisors (36209272876).

72418545746 is a wasteful number, since it uses less digits than its factorization.

72418545746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36209272875.

The product of its digits is 7526400, while the sum is 53.

The spelling of 72418545746 in words is "seventy-two billion, four hundred eighteen million, five hundred forty-five thousand, seven hundred forty-six".