51918526485 has 72 divisors (see below), whose sum is σ = 106401120696. Its totient is φ = 23345038080.

The previous prime is 51918526459. The next prime is 51918526489. The reversal of 51918526485 is 58462581915.

51918526485 is a `hidden beast` number, since 51 + 91 + 8 + 5 + 26 + 485 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1739390436 + 50179136049 = 41706^2 + 224007^2 .

It is not a de Polignac number, because 51918526485 - 2⁸ = 51918526229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51918526489) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 58494 + ... + 327503.

It is an arithmetic number, because the mean of its divisors is an integer number (1477793343).

Almost surely, 2^51918526485 is an apocalyptic number.

It is an amenable number.

51918526485 is an abundant number, since it is smaller than the sum of its proper divisors (54482594211).

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

51918526485 is a wasteful number, since it uses less digits than its factorization.

51918526485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386083 (or 386073 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

The spelling of 51918526485 in words is "fifty-one billion, nine hundred eighteen million, five hundred twenty-six thousand, four hundred eighty-five".