51521561062 has 4 divisors (see below), whose sum is σ = 77282341596. Its totient is φ = 25760780530.

The previous prime is 51521561059. The next prime is 51521561089. The reversal of 51521561062 is 26016512515.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880390264 + ... + 12880390267.

It is an arithmetic number, because the mean of its divisors is an integer number (19320585399).

Almost surely, 2^51521561062 is an apocalyptic number.

51521561062 is a deficient number, since it is larger than the sum of its proper divisors (25760780534).

51521561062 is a wasteful number, since it uses less digits than its factorization.

51521561062 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25760780533.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 51521561062 in words is "fifty-one billion, five hundred twenty-one million, five hundred sixty-one thousand, sixty-two".