51651110406 has 48 divisors (see below), whose sum is σ = 121291027776. Its totient is φ = 14619531024.

The previous prime is 51651110389. The next prime is 51651110429. The reversal of 51651110406 is 60401115615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 789496 + ... + 852411.

It is an arithmetic number, because the mean of its divisors is an integer number (2526896412).

Almost surely, 2^51651110406 is an apocalyptic number.

51651110406 is an abundant number, since it is smaller than the sum of its proper divisors (69639917370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51651110406 is a wasteful number, since it uses less digits than its factorization.

51651110406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642033 (or 1642026 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

The spelling of 51651110406 in words is "fifty-one billion, six hundred fifty-one million, one hundred ten thousand, four hundred six".