51996340887 has 8 divisors (see below), whose sum is σ = 69331413504. Its totient is φ = 34662747768.

The previous prime is 51996340871. The next prime is 51996340927. The reversal of 51996340887 is 78804369915.

51996340887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51996340887 - 2⁴ = 51996340871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51996340887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51996340387) 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, 285093 + ... + 430430.

It is an arithmetic number, because the mean of its divisors is an integer number (8666426688).

Almost surely, 2^51996340887 is an apocalyptic number.

51996340887 is a deficient number, since it is larger than the sum of its proper divisors (17335072617).

51996340887 is a wasteful number, since it uses less digits than its factorization.

51996340887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739749.

The product of its (nonzero) digits is 13063680, while the sum is 60.

The spelling of 51996340887 in words is "fifty-one billion, nine hundred ninety-six million, three hundred forty thousand, eight hundred eighty-seven".