51487046394 has 16 divisors (see below), whose sum is σ = 117684677568. Its totient is φ = 14710584672.

The previous prime is 51487046333. The next prime is 51487046399. The reversal of 51487046394 is 49364078415.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51487046399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612940987 + ... + 612941070.

It is an arithmetic number, because the mean of its divisors is an integer number (7355292348).

Almost surely, 2^51487046394 is an apocalyptic number.

51487046394 is an abundant number, since it is smaller than the sum of its proper divisors (66197631174).

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

51487046394 is a wasteful number, since it uses less digits than its factorization.

51487046394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225882069.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 51487046394 in words is "fifty-one billion, four hundred eighty-seven million, forty-six thousand, three hundred ninety-four".