77873078953 has 4 divisors (see below), whose sum is σ = 78587510980. Its totient is φ = 77158646928.

The previous prime is 77873078917. The next prime is 77873078963. The reversal of 77873078953 is 35987037877.

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 48403520064 + 29469558889 = 220008^2 + 171667^2 .

It is a cyclic number.

It is not a de Polignac number, because 77873078953 - 2¹⁷ = 77872947881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77873078963) 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, 357215850 + ... + 357216067.

It is an arithmetic number, because the mean of its divisors is an integer number (19646877745).

Almost surely, 2^77873078953 is an apocalyptic number.

It is an amenable number.

77873078953 is a deficient number, since it is larger than the sum of its proper divisors (714432027).

77873078953 is a wasteful number, since it uses less digits than its factorization.

77873078953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714432026.

The product of its (nonzero) digits is 62233920, while the sum is 64.

The spelling of 77873078953 in words is "seventy-seven billion, eight hundred seventy-three million, seventy-eight thousand, nine hundred fifty-three".