51166520102 has 4 divisors (see below), whose sum is σ = 76749780156. Its totient is φ = 25583260050.

The previous prime is 51166520081. The next prime is 51166520143. The reversal of 51166520102 is 20102566115.

It is a happy number.

51166520102 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 12791630024 + ... + 12791630027.

It is an arithmetic number, because the mean of its divisors is an integer number (19187445039).

Almost surely, 2^51166520102 is an apocalyptic number.

51166520102 is a deficient number, since it is larger than the sum of its proper divisors (25583260054).

51166520102 is a wasteful number, since it uses less digits than its factorization.

51166520102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25583260053.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 51166520102 in words is "fifty-one billion, one hundred sixty-six million, five hundred twenty thousand, one hundred two".