50778653 has 4 divisors (see below), whose sum is σ = 51390528. Its totient is φ = 50166780.

The previous prime is 50778649. The next prime is 50778671. The reversal of 50778653 is 35687705.

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 50778653 - 2² = 50778649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50778653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50778953) 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, 305813 + ... + 305978.

It is an arithmetic number, because the mean of its divisors is an integer number (12847632).

Almost surely, 2^50778653 is an apocalyptic number.

It is an amenable number.

50778653 is a deficient number, since it is larger than the sum of its proper divisors (611875).

50778653 is an equidigital number, since it uses as much as digits as its factorization.

50778653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611874.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 50778653 is about 7125.9141869658. The cubic root of 50778653 is about 370.3056957440.

The spelling of 50778653 in words is "fifty million, seven hundred seventy-eight thousand, six hundred fifty-three".