51906432919 has 16 divisors (see below), whose sum is σ = 58047010560. Its totient is φ = 46004440000.

The previous prime is 51906432889. The next prime is 51906432931. The reversal of 51906432919 is 91923460915.

It is a cyclic number.

It is not a de Polignac number, because 51906432919 - 2⁵ = 51906432887 is a prime.

It is a super-2 number, since 2×51906432919² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51906432989) 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, 614742 + ... + 694060.

It is an arithmetic number, because the mean of its divisors is an integer number (3627938160).

Almost surely, 2^51906432919 is an apocalyptic number.

51906432919 is a deficient number, since it is larger than the sum of its proper divisors (6140577641).

51906432919 is a wasteful number, since it uses less digits than its factorization.

51906432919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80822.

The product of its (nonzero) digits is 524880, while the sum is 49.

The spelling of 51906432919 in words is "fifty-one billion, nine hundred six million, four hundred thirty-two thousand, nine hundred nineteen".