684180454557 has 16 divisors (see below), whose sum is σ = 924262560000. Its totient is φ = 450115258944.

The previous prime is 684180454511. The next prime is 684180454567. The reversal of 684180454557 is 755454081486.

It is not a de Polignac number, because 684180454557 - 2¹⁴ = 684180438173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684180454497 and 684180454506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684180454567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278682 + ... + 1202507.

It is an arithmetic number, because the mean of its divisors is an integer number (57766410000).

Almost surely, 2^684180454557 is an apocalyptic number.

It is an amenable number.

684180454557 is a deficient number, since it is larger than the sum of its proper divisors (240082105443).

684180454557 is a wasteful number, since it uses less digits than its factorization.

684180454557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483220.

The product of its (nonzero) digits is 21504000, while the sum is 57.

The spelling of 684180454557 in words is "six hundred eighty-four billion, one hundred eighty million, four hundred fifty-four thousand, five hundred fifty-seven".