51575661146 has 32 divisors (see below), whose sum is σ = 81596970000. Its totient is φ = 24412111360.

The previous prime is 51575661121. The next prime is 51575661161. The reversal of 51575661146 is 64116657515.

It can be written as a sum of positive squares in 8 ways, for example, as 28506607921 + 23069053225 = 168839^2 + 151885^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51575661146.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5285480 + ... + 5295228.

Almost surely, 2^51575661146 is an apocalyptic number.

51575661146 is a deficient number, since it is larger than the sum of its proper divisors (30021308854).

51575661146 is a wasteful number, since it uses less digits than its factorization.

51575661146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11554.

The product of its digits is 756000, while the sum is 47.

The spelling of 51575661146 in words is "fifty-one billion, five hundred seventy-five million, six hundred sixty-one thousand, one hundred forty-six".