51654884511 has 4 divisors (see below), whose sum is σ = 68873179352. Its totient is φ = 34436589672.

The previous prime is 51654884459. The next prime is 51654884513. The reversal of 51654884511 is 11548845615.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 51654884511 - 2⁶ = 51654884447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51654884513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8609147416 + ... + 8609147421.

It is an arithmetic number, because the mean of its divisors is an integer number (17218294838).

Almost surely, 2^51654884511 is an apocalyptic number.

51654884511 is a deficient number, since it is larger than the sum of its proper divisors (17218294841).

51654884511 is a wasteful number, since it uses less digits than its factorization.

51654884511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17218294840.

The product of its digits is 768000, while the sum is 48.

The spelling of 51654884511 in words is "fifty-one billion, six hundred fifty-four million, eight hundred eighty-four thousand, five hundred eleven".