51135027698 has 16 divisors (see below), whose sum is σ = 77531639640. Its totient is φ = 25291408896.

The previous prime is 51135027673. The next prime is 51135027707. The reversal of 51135027698 is 89672053115.

It can be written as a sum of positive squares in 4 ways, for example, as 50955387289 + 179640409 = 225733^2 + 13403^2 .

It is a super-2 number, since 2×51135027698² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334088 + ... + 462476.

Almost surely, 2^51135027698 is an apocalyptic number.

51135027698 is a deficient number, since it is larger than the sum of its proper divisors (26396611942).

51135027698 is a wasteful number, since it uses less digits than its factorization.

51135027698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130541.

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 51135027698 in words is "fifty-one billion, one hundred thirty-five million, twenty-seven thousand, six hundred ninety-eight".