51270136406 has 4 divisors (see below), whose sum is σ = 76905204612. Its totient is φ = 25635068202.

The previous prime is 51270136403. The next prime is 51270136433. The reversal of 51270136406 is 60463107215.

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 (51270136403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817534100 + ... + 12817534103.

It is an arithmetic number, because the mean of its divisors is an integer number (19226301153).

Almost surely, 2^51270136406 is an apocalyptic number.

51270136406 is a deficient number, since it is larger than the sum of its proper divisors (25635068206).

51270136406 is a wasteful number, since it uses less digits than its factorization.

51270136406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25635068205.

The product of its (nonzero) digits is 30240, while the sum is 35.

The spelling of 51270136406 in words is "fifty-one billion, two hundred seventy million, one hundred thirty-six thousand, four hundred six".