73097755777 has 4 divisors (see below), whose sum is σ = 75073370836. Its totient is φ = 71122140720.

The previous prime is 73097755763. The next prime is 73097755823. The reversal of 73097755777 is 77755779037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77755779037 = 19 ⋅4092409423.

It can be written as a sum of positive squares in 2 ways, for example, as 70394171761 + 2703584016 = 265319^2 + 51996^2 .

It is a cyclic number.

It is not a de Polignac number, because 73097755777 - 2¹⁵ = 73097723009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73097755477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987807474 + ... + 987807547.

It is an arithmetic number, because the mean of its divisors is an integer number (18768342709).

Almost surely, 2^73097755777 is an apocalyptic number.

It is an amenable number.

73097755777 is a deficient number, since it is larger than the sum of its proper divisors (1975615059).

73097755777 is a wasteful number, since it uses less digits than its factorization.

73097755777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1975615058.

The product of its (nonzero) digits is 79413075, while the sum is 64.

The spelling of 73097755777 in words is "seventy-three billion, ninety-seven million, seven hundred fifty-five thousand, seven hundred seventy-seven".