51545533554 has 12 divisors (see below), whose sum is σ = 111681989406. Its totient is φ = 17181844512.

The previous prime is 51545533489. The next prime is 51545533579. The reversal of 51545533554 is 45533554515.

51545533554 is a `hidden beast` number, since 5 + 1 + 5 + 45 + 53 + 3 + 554 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38505035529 + 13040498025 = 196227^2 + 114195^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1431820359 + ... + 1431820394.

Almost surely, 2^51545533554 is an apocalyptic number.

51545533554 is an abundant number, since it is smaller than the sum of its proper divisors (60136455852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51545533554 is a wasteful number, since it uses less digits than its factorization.

51545533554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863640761 (or 2863640758 counting only the distinct ones).

The product of its digits is 2250000, while the sum is 45.

The spelling of 51545533554 in words is "fifty-one billion, five hundred forty-five million, five hundred thirty-three thousand, five hundred fifty-four".