50778257585 has 16 divisors (see below), whose sum is σ = 67094609472. Its totient is φ = 36584500800.

The previous prime is 50778257561. The next prime is 50778257603. The reversal of 50778257585 is 58575287705.

It is a happy number.

It is not a de Polignac number, because 50778257585 - 2¹⁴ = 50778241201 is a prime.

It is a super-2 number, since 2×50778257585² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4308326 + ... + 4320095.

It is an arithmetic number, because the mean of its divisors is an integer number (4193413092).

Almost surely, 2^50778257585 is an apocalyptic number.

50778257585 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

50778257585 is a deficient number, since it is larger than the sum of its proper divisors (16316351887).

50778257585 is a wasteful number, since it uses less digits than its factorization.

50778257585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8628544.

The product of its (nonzero) digits is 27440000, while the sum is 59.

The spelling of 50778257585 in words is "fifty billion, seven hundred seventy-eight million, two hundred fifty-seven thousand, five hundred eighty-five".