51616615576 has 8 divisors (see below), whose sum is σ = 96781154220. Its totient is φ = 25808307784.

The previous prime is 51616615553. The next prime is 51616615579. The reversal of 51616615576 is 67551661615.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51616615579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3226038466 + ... + 3226038481.

Almost surely, 2^51616615576 is an apocalyptic number.

It is an amenable number.

51616615576 is a deficient number, since it is larger than the sum of its proper divisors (45164538644).

51616615576 is a wasteful number, since it uses less digits than its factorization.

51616615576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452076953 (or 6452076949 counting only the distinct ones).

The product of its digits is 1134000, while the sum is 49.

The spelling of 51616615576 in words is "fifty-one billion, six hundred sixteen million, six hundred fifteen thousand, five hundred seventy-six".