77738605235273 has 4 divisors (see below), whose sum is σ = 80419246795140. Its totient is φ = 75057963675408.

The previous prime is 77738605235251. The next prime is 77738605235287. The reversal of 77738605235273 is 37253250683777.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18051732105289 + 59686873129984 = 4248733^2 + 7725728^2 .

It is a cyclic number.

It is not a de Polignac number, because 77738605235273 - 2⁸ = 77738605235017 is a prime.

It is a super-2 number, since 2×77738605235273² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77738605235773) 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, 1340320779890 + ... + 1340320779947.

It is an arithmetic number, because the mean of its divisors is an integer number (20104811698785).

Almost surely, 2^{77738605235273} is an apocalyptic number.

It is an amenable number.

77738605235273 is a deficient number, since it is larger than the sum of its proper divisors (2680641559867).

77738605235273 is a wasteful number, since it uses less digits than its factorization.

77738605235273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2680641559866.

The product of its (nonzero) digits is 311169600, while the sum is 65.

The spelling of 77738605235273 in words is "seventy-seven trillion, seven hundred thirty-eight billion, six hundred five million, two hundred thirty-five thousand, two hundred seventy-three".