51153505066 has 8 divisors (see below), whose sum is σ = 76733329284. Its totient is φ = 25575728640.

The previous prime is 51153505063. The next prime is 51153505127. The reversal of 51153505066 is 66050535115.

It can be written as a sum of positive squares in 2 ways, for example, as 38783394225 + 12370110841 = 196935^2 + 111221^2 .

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

It is not an unprimeable number, because it can be changed into a prime (51153505061) 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, 447895 + ... + 550378.

Almost surely, 2^51153505066 is an apocalyptic number.

51153505066 is a deficient number, since it is larger than the sum of its proper divisors (25579824218).

51153505066 is a wasteful number, since it uses less digits than its factorization.

51153505066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023896.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 51153505066 in words is "fifty-one billion, one hundred fifty-three million, five hundred five thousand, sixty-six".