51006284885 has 4 divisors (see below), whose sum is σ = 61207541868. Its totient is φ = 40805027904.

The previous prime is 51006284873. The next prime is 51006284911. The reversal of 51006284885 is 58848260015.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30304542724 + 20701742161 = 174082^2 + 143881^2 .

It is a cyclic number.

It is not a de Polignac number, because 51006284885 - 2²⁰ = 51005236309 is a prime.

It is a Duffinian number.

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, 5100628484 + ... + 5100628493.

It is an arithmetic number, because the mean of its divisors is an integer number (15301885467).

Almost surely, 2^51006284885 is an apocalyptic number.

It is an amenable number.

51006284885 is a deficient number, since it is larger than the sum of its proper divisors (10201256983).

51006284885 is a wasteful number, since it uses less digits than its factorization.

51006284885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10201256982.

The product of its (nonzero) digits is 614400, while the sum is 47.

The spelling of 51006284885 in words is "fifty-one billion, six million, two hundred eighty-four thousand, eight hundred eighty-five".