51908240379 has 4 divisors (see below), whose sum is σ = 69210987176. Its totient is φ = 34605493584.

The previous prime is 51908240353. The next prime is 51908240389. The reversal of 51908240379 is 97304280915.

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

It is not a de Polignac number, because 51908240379 - 2¹² = 51908236283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51908240339) 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, 8651373394 + ... + 8651373399.

It is an arithmetic number, because the mean of its divisors is an integer number (17302746794).

Almost surely, 2^51908240379 is an apocalyptic number.

51908240379 is a deficient number, since it is larger than the sum of its proper divisors (17302746797).

51908240379 is a wasteful number, since it uses less digits than its factorization.

51908240379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17302746796.

The product of its (nonzero) digits is 544320, while the sum is 48.

The spelling of 51908240379 in words is "fifty-one billion, nine hundred eight million, two hundred forty thousand, three hundred seventy-nine".