772898509879 has 4 divisors (see below), whose sum is σ = 813577378840. Its totient is φ = 732219640920.

The previous prime is 772898509871. The next prime is 772898509951. The reversal of 772898509879 is 978905898277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 978905898277 = 53 ⋅18469922609.

It is a cyclic number.

It is not a de Polignac number, because 772898509879 - 2³ = 772898509871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 772898509799 and 772898509808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772898509871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20339434452 + ... + 20339434489.

It is an arithmetic number, because the mean of its divisors is an integer number (203394344710).

Almost surely, 2^772898509879 is an apocalyptic number.

772898509879 is a deficient number, since it is larger than the sum of its proper divisors (40678868961).

772898509879 is a wasteful number, since it uses less digits than its factorization.

772898509879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40678868960.

The product of its (nonzero) digits is 1280240640, while the sum is 79.

The spelling of 772898509879 in words is "seven hundred seventy-two billion, eight hundred ninety-eight million, five hundred nine thousand, eight hundred seventy-nine".