73452277561 has 4 divisors (see below), whose sum is σ = 79102452772. Its totient is φ = 67802102352.

The previous prime is 73452277541. The next prime is 73452277571. The reversal of 73452277561 is 16577225437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16577225437 = 17293 ⋅958609.

It can be written as a sum of positive squares in 2 ways, for example, as 46994001961 + 26458275600 = 216781^2 + 162660^2 .

It is a cyclic number.

It is not a de Polignac number, because 73452277561 - 2⁷ = 73452277433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73452277541) 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 in 3 ways as a sum of consecutive naturals, for example, 2825087586 + ... + 2825087611.

It is an arithmetic number, because the mean of its divisors is an integer number (19775613193).

Almost surely, 2^73452277561 is an apocalyptic number.

It is an amenable number.

73452277561 is a deficient number, since it is larger than the sum of its proper divisors (5650175211).

73452277561 is a wasteful number, since it uses less digits than its factorization.

73452277561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650175210.

The product of its digits is 2469600, while the sum is 49.

The spelling of 73452277561 in words is "seventy-three billion, four hundred fifty-two million, two hundred seventy-seven thousand, five hundred sixty-one".