51644084518 has 8 divisors (see below), whose sum is σ = 83425059648. Its totient is φ = 23835731304.

The previous prime is 51644084501. The next prime is 51644084539. The reversal of 51644084518 is 81548044615.

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

It is a super-2 number, since 2×51644084518² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993155446 + ... + 993155497.

It is an arithmetic number, because the mean of its divisors is an integer number (10428132456).

Almost surely, 2^51644084518 is an apocalyptic number.

51644084518 is a deficient number, since it is larger than the sum of its proper divisors (31780975130).

51644084518 is a wasteful number, since it uses less digits than its factorization.

51644084518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986310958.

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 51644084518 in words is "fifty-one billion, six hundred forty-four million, eighty-four thousand, five hundred eighteen".