54680187857 has 4 divisors (see below), whose sum is σ = 54757311540. Its totient is φ = 54603064176.

The previous prime is 54680187853. The next prime is 54680187871. The reversal of 54680187857 is 75878108645.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8289920401 + 46390267456 = 91049^2 + 215384^2 .

It is a cyclic number.

It is not a de Polignac number, because 54680187857 - 2² = 54680187853 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54680187796 and 54680187805.

It is not an unprimeable number, because it can be changed into a prime (54680187853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38560778 + ... + 38562195.

It is an arithmetic number, because the mean of its divisors is an integer number (13689327885).

Almost surely, 2^54680187857 is an apocalyptic number.

It is an amenable number.

54680187857 is a deficient number, since it is larger than the sum of its proper divisors (77123683).

54680187857 is an equidigital number, since it uses as much as digits as its factorization.

54680187857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77123682.

The product of its (nonzero) digits is 15052800, while the sum is 59.

The spelling of 54680187857 in words is "fifty-four billion, six hundred eighty million, one hundred eighty-seven thousand, eight hundred fifty-seven".