51548740857 has 12 divisors (see below), whose sum is σ = 74632057344. Its totient is φ = 34286089560.

The previous prime is 51548740847. The next prime is 51548740877. The reversal of 51548740857 is 75804784515.

51548740857 is a `hidden beast` number, since 5 + 1 + 548 + 7 + 40 + 8 + 57 = 666.

It is not a de Polignac number, because 51548740857 - 2³⁰ = 50474999033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51548740847) 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, 6640713 + ... + 6648470.

It is an arithmetic number, because the mean of its divisors is an integer number (6219338112).

Almost surely, 2^51548740857 is an apocalyptic number.

It is an amenable number.

51548740857 is a deficient number, since it is larger than the sum of its proper divisors (23083316487).

51548740857 is a wasteful number, since it uses less digits than its factorization.

51548740857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13289620 (or 13289617 counting only the distinct ones).

The product of its (nonzero) digits is 6272000, while the sum is 54.

The spelling of 51548740857 in words is "fifty-one billion, five hundred forty-eight million, seven hundred forty thousand, eight hundred fifty-seven".