51354740438 has 4 divisors (see below), whose sum is σ = 77032110660. Its totient is φ = 25677370218.

The previous prime is 51354740417. The next prime is 51354740441. The reversal of 51354740438 is 83404745315.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12838685108 + ... + 12838685111.

It is an arithmetic number, because the mean of its divisors is an integer number (19258027665).

Almost surely, 2^51354740438 is an apocalyptic number.

51354740438 is a deficient number, since it is larger than the sum of its proper divisors (25677370222).

51354740438 is a wasteful number, since it uses less digits than its factorization.

51354740438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25677370221.

The product of its (nonzero) digits is 806400, while the sum is 44.

The spelling of 51354740438 in words is "fifty-one billion, three hundred fifty-four million, seven hundred forty thousand, four hundred thirty-eight".