72415551445 has 4 divisors (see below), whose sum is σ = 86898661740. Its totient is φ = 57932441152.

The previous prime is 72415551419. The next prime is 72415551463. The reversal of 72415551445 is 54415551427.

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: 54415551427 = 85303 ⋅637909.

It can be written as a sum of positive squares in 2 ways, for example, as 24513225489 + 47902325956 = 156567^2 + 218866^2 .

It is a cyclic number.

It is not a de Polignac number, because 72415551445 - 2¹³ = 72415543253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7241555140 + ... + 7241555149.

It is an arithmetic number, because the mean of its divisors is an integer number (21724665435).

Almost surely, 2^72415551445 is an apocalyptic number.

It is an amenable number.

72415551445 is a deficient number, since it is larger than the sum of its proper divisors (14483110295).

72415551445 is a wasteful number, since it uses less digits than its factorization.

72415551445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14483110294.

The product of its digits is 560000, while the sum is 43.

The spelling of 72415551445 in words is "seventy-two billion, four hundred fifteen million, five hundred fifty-one thousand, four hundred forty-five".