51420345634 has 8 divisors (see below), whose sum is σ = 88149163968. Its totient is φ = 22037290980.

The previous prime is 51420345631. The next prime is 51420345649. The reversal of 51420345634 is 43654302415.

51420345634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 51420345593 and 51420345602.

It is not an unprimeable number, because it can be changed into a prime (51420345631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1836440902 + ... + 1836440929.

It is an arithmetic number, because the mean of its divisors is an integer number (11018645496).

Almost surely, 2^51420345634 is an apocalyptic number.

51420345634 is a deficient number, since it is larger than the sum of its proper divisors (36728818334).

51420345634 is a wasteful number, since it uses less digits than its factorization.

51420345634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672881840.

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 51420345634 in words is "fifty-one billion, four hundred twenty million, three hundred forty-five thousand, six hundred thirty-four".