51025235545 has 4 divisors (see below), whose sum is σ = 61230282660. Its totient is φ = 40820188432.

The previous prime is 51025235533. The next prime is 51025235551. The reversal of 51025235545 is 54553252015.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54553252015 = 5 ⋅10910650403.

It can be written as a sum of positive squares in 2 ways, for example, as 10809345024 + 40215890521 = 103968^2 + 200539^2 .

It is a cyclic number.

It is not a de Polignac number, because 51025235545 - 2¹³ = 51025227353 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5102523550 + ... + 5102523559.

It is an arithmetic number, because the mean of its divisors is an integer number (15307570665).

Almost surely, 2^51025235545 is an apocalyptic number.

It is an amenable number.

51025235545 is a deficient number, since it is larger than the sum of its proper divisors (10205047115).

51025235545 is a wasteful number, since it uses less digits than its factorization.

51025235545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10205047114.

The product of its (nonzero) digits is 150000, while the sum is 37.

The spelling of 51025235545 in words is "fifty-one billion, twenty-five million, two hundred thirty-five thousand, five hundred forty-five".