51004635406 has 4 divisors (see below), whose sum is σ = 76506953112. Its totient is φ = 25502317702.

The previous prime is 51004635401. The next prime is 51004635421. The reversal of 51004635406 is 60453640015.

51004635406 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 not an unprimeable number, because it can be changed into a prime (51004635401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751158850 + ... + 12751158853.

It is an arithmetic number, because the mean of its divisors is an integer number (19126738278).

Almost surely, 2^51004635406 is an apocalyptic number.

51004635406 is a deficient number, since it is larger than the sum of its proper divisors (25502317706).

51004635406 is a wasteful number, since it uses less digits than its factorization.

51004635406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25502317705.

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 51004635406 in words is "fifty-one billion, four million, six hundred thirty-five thousand, four hundred six".