51142909683 has 4 divisors (see below), whose sum is σ = 68190546248. Its totient is φ = 34095273120.

The previous prime is 51142909663. The next prime is 51142909693. The reversal of 51142909683 is 38690924115.

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

It is not a de Polignac number, because 51142909683 - 2²² = 51138715379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51142909663) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 8523818278 + ... + 8523818283.

It is an arithmetic number, because the mean of its divisors is an integer number (17047636562).

Almost surely, 2^51142909683 is an apocalyptic number.

51142909683 is a deficient number, since it is larger than the sum of its proper divisors (17047636565).

51142909683 is a wasteful number, since it uses less digits than its factorization.

51142909683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17047636564.

The product of its (nonzero) digits is 466560, while the sum is 48.

The spelling of 51142909683 in words is "fifty-one billion, one hundred forty-two million, nine hundred nine thousand, six hundred eighty-three".