50672721561 has 64 divisors (see below), whose sum is σ = 87956914176. Its totient is φ = 25161998400.

The previous prime is 50672721557. The next prime is 50672721569. The reversal of 50672721561 is 16512727605.

It is a happy number.

It is not a de Polignac number, because 50672721561 - 2² = 50672721557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50672721569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12276280 + ... + 12280406.

It is an arithmetic number, because the mean of its divisors is an integer number (1374326784).

Almost surely, 2^50672721561 is an apocalyptic number.

It is an amenable number.

50672721561 is a deficient number, since it is larger than the sum of its proper divisors (37284192615).

50672721561 is a wasteful number, since it uses less digits than its factorization.

50672721561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 50672721561 in words is "fifty billion, six hundred seventy-two million, seven hundred twenty-one thousand, five hundred sixty-one".