50778672837121 has 4 divisors (see below), whose sum is σ = 50797198441044. Its totient is φ = 50760147233200.

The previous prime is 50778672837119. The next prime is 50778672837173. The reversal of 50778672837121 is 12173827687705.

It is a happy number.

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 4649582251521 + 46129090585600 = 2156289^2 + 6791840^2 .

It is a cyclic number.

It is not a de Polignac number, because 50778672837121 - 2¹ = 50778672837119 is a prime.

It is a super-3 number, since 3×50778672837121³ (a number of 42 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50778672837421) 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, 9262797850 + ... + 9262803331.

It is an arithmetic number, because the mean of its divisors is an integer number (12699299610261).

Almost surely, 2^{50778672837121} is an apocalyptic number.

It is an amenable number.

50778672837121 is a deficient number, since it is larger than the sum of its proper divisors (18525603923).

50778672837121 is a wasteful number, since it uses less digits than its factorization.

50778672837121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18525603922.

The product of its (nonzero) digits is 55319040, while the sum is 64.

The spelling of 50778672837121 in words is "fifty trillion, seven hundred seventy-eight billion, six hundred seventy-two million, eight hundred thirty-seven thousand, one hundred twenty-one".