51209795349 has 8 divisors (see below), whose sum is σ = 75866363520. Its totient is φ = 34139863548.

The previous prime is 51209795341. The next prime is 51209795369. The reversal of 51209795349 is 94359790215.

51209795349 is a `hidden beast` number, since 5 + 1 + 209 + 7 + 95 + 349 = 666.

It is not a de Polignac number, because 51209795349 - 2³ = 51209795341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51209795295 and 51209795304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51209795341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948329517 + ... + 948329570.

It is an arithmetic number, because the mean of its divisors is an integer number (9483295440).

Almost surely, 2^51209795349 is an apocalyptic number.

It is an amenable number.

51209795349 is a deficient number, since it is larger than the sum of its proper divisors (24656568171).

51209795349 is a wasteful number, since it uses less digits than its factorization.

51209795349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896659096 (or 1896659090 counting only the distinct ones).

The product of its (nonzero) digits is 3061800, while the sum is 54.

The spelling of 51209795349 in words is "fifty-one billion, two hundred nine million, seven hundred ninety-five thousand, three hundred forty-nine".