51466125506 has 4 divisors (see below), whose sum is σ = 77199188262. Its totient is φ = 25733062752.

The previous prime is 51466125457. The next prime is 51466125511. The reversal of 51466125506 is 60552166415.

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

It can be written as a sum of positive squares in only one way, i.e., 50037663481 + 1428462025 = 223691^2 + 37795^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12866531375 + ... + 12866531378.

Almost surely, 2^51466125506 is an apocalyptic number.

51466125506 is a deficient number, since it is larger than the sum of its proper divisors (25733062756).

51466125506 is a wasteful number, since it uses less digits than its factorization.

51466125506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25733062755.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 51466125506 in words is "fifty-one billion, four hundred sixty-six million, one hundred twenty-five thousand, five hundred six".