51125405461465 has 8 divisors (see below), whose sum is σ = 61505021786760. Its totient is φ = 40797300880512.

The previous prime is 51125405461451. The next prime is 51125405461499. The reversal of 51125405461465 is 56416450452115.

It can be written as a sum of positive squares in 4 ways, for example, as 8919970703424 + 42205434758041 = 2986632^2 + 6496571^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 51125405461465 - 2¹¹ = 51125405459417 is a prime.

It is a super-2 number, since 2×51125405461465² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12877933900 + ... + 12877937869.

It is an arithmetic number, because the mean of its divisors is an integer number (7688127723345).

Almost surely, 2^{51125405461465} is an apocalyptic number.

It is an amenable number.

51125405461465 is a deficient number, since it is larger than the sum of its proper divisors (10379616325295).

51125405461465 is a wasteful number, since it uses less digits than its factorization.

51125405461465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25755872171.

The product of its (nonzero) digits is 2880000, while the sum is 49.

The spelling of 51125405461465 in words is "fifty-one trillion, one hundred twenty-five billion, four hundred five million, four hundred sixty-one thousand, four hundred sixty-five".