51086331878487 has 16 divisors (see below), whose sum is σ = 69253325345760. Its totient is φ = 33488794483200.

The previous prime is 51086331878441. The next prime is 51086331878497. The reversal of 51086331878487 is 78487813368015.

It is not a de Polignac number, because 51086331878487 - 2¹⁹ = 51086331354199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51086331878497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42909214 + ... + 44083707.

It is an arithmetic number, because the mean of its divisors is an integer number (4328332834110).

Almost surely, 2^{51086331878487} is an apocalyptic number.

51086331878487 is a deficient number, since it is larger than the sum of its proper divisors (18166993467273).

51086331878487 is a wasteful number, since it uses less digits than its factorization.

51086331878487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86996194.

The product of its (nonzero) digits is 216760320, while the sum is 69.

The spelling of 51086331878487 in words is "fifty-one trillion, eighty-six billion, three hundred thirty-one million, eight hundred seventy-eight thousand, four hundred eighty-seven".