50778894749 has 4 divisors (see below), whose sum is σ = 55395157920. Its totient is φ = 46162631580.

The previous prime is 50778894703. The next prime is 50778894767. The reversal of 50778894749 is 94749887705.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50778894749 - 2²⁴ = 50762117533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50778894769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2308131569 + ... + 2308131590.

It is an arithmetic number, because the mean of its divisors is an integer number (13848789480).

Almost surely, 2^50778894749 is an apocalyptic number.

It is an amenable number.

50778894749 is a deficient number, since it is larger than the sum of its proper divisors (4616263171).

50778894749 is a wasteful number, since it uses less digits than its factorization.

50778894749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4616263170.

The product of its (nonzero) digits is 142248960, while the sum is 68.

The spelling of 50778894749 in words is "fifty billion, seven hundred seventy-eight million, eight hundred ninety-four thousand, seven hundred forty-nine".