51649000143 has 64 divisors (see below), whose sum is σ = 79634524032. Its totient is φ = 29494149120.

The previous prime is 51649000141. The next prime is 51649000147. The reversal of 51649000143 is 34100094615.

It is not a de Polignac number, because 51649000143 - 2¹ = 51649000141 is a prime.

It is a super-3 number, since 3×51649000143³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51649000141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18841753 + ... + 18844493.

It is an arithmetic number, because the mean of its divisors is an integer number (1244289438).

Almost surely, 2^51649000143 is an apocalyptic number.

51649000143 is a deficient number, since it is larger than the sum of its proper divisors (27985523889).

51649000143 is a wasteful number, since it uses less digits than its factorization.

With its successor (51649000144) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (3164).

51649000143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3164.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 51649000143 its reverse (34100094615), we get a palindrome (85749094758).

The spelling of 51649000143 in words is "fifty-one billion, six hundred forty-nine million, one hundred forty-three", and thus it is an aban number.