51242661063 has 12 divisors (see below), whose sum is σ = 80746011528. Its totient is φ = 31056158160.

The previous prime is 51242661047. The next prime is 51242661103. The reversal of 51242661063 is 36016624215.

51242661063 is a `hidden beast` number, since 5 + 12 + 4 + 26 + 610 + 6 + 3 = 666.

It is not a de Polignac number, because 51242661063 - 2⁴ = 51242661047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51242661163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258801220 + ... + 258801417.

It is an arithmetic number, because the mean of its divisors is an integer number (6728834294).

Almost surely, 2^51242661063 is an apocalyptic number.

51242661063 is a deficient number, since it is larger than the sum of its proper divisors (29503350465).

51242661063 is a wasteful number, since it uses less digits than its factorization.

51242661063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517602654 (or 517602651 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 51242661063 in words is "fifty-one billion, two hundred forty-two million, six hundred sixty-one thousand, sixty-three".