50561007778351 has 24 divisors (see below), whose sum is σ = 58916549044080. Its totient is φ = 43263852508800.

The previous prime is 50561007778319. The next prime is 50561007778381. The reversal of 50561007778351 is 15387770016505.

It is not a de Polignac number, because 50561007778351 - 2⁵ = 50561007778319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 50561007778292 and 50561007778301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50561007778381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 129179835 + ... + 129570643.

It is an arithmetic number, because the mean of its divisors is an integer number (2454856210170).

Almost surely, 2^{50561007778351} is an apocalyptic number.

50561007778351 is a deficient number, since it is larger than the sum of its proper divisors (8355541265729).

50561007778351 is a wasteful number, since it uses less digits than its factorization.

50561007778351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395335 (or 395328 counting only the distinct ones).

The product of its (nonzero) digits is 6174000, while the sum is 55.

The spelling of 50561007778351 in words is "fifty trillion, five hundred sixty-one billion, seven million, seven hundred seventy-eight thousand, three hundred fifty-one".