51125506525066 has 16 divisors (see below), whose sum is σ = 77743293461064. Its totient is φ = 25212874235904.

The previous prime is 51125506525057. The next prime is 51125506525087. The reversal of 51125506525066 is 66052560552115.

It can be written as a sum of positive squares in 4 ways, for example, as 48521269049841 + 2604237475225 = 6965721^2 + 1613765^2 .

It is a super-2 number, since 2×51125506525066² (a number of 28 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, 449659095 + ... + 449772778.

Almost surely, 2^{51125506525066} is an apocalyptic number.

51125506525066 is a deficient number, since it is larger than the sum of its proper divisors (26617786935998).

51125506525066 is a wasteful number, since it uses less digits than its factorization.

51125506525066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899432265.

The product of its (nonzero) digits is 2700000, while the sum is 49.

The spelling of 51125506525066 in words is "fifty-one trillion, one hundred twenty-five billion, five hundred six million, five hundred twenty-five thousand, sixty-six".