684515412044 has 24 divisors (see below), whose sum is σ = 1236597532800. Its totient is φ = 331202787840.

The previous prime is 684515411977. The next prime is 684515412067. The reversal of 684515412044 is 440214515486.

It is a super-2 number, since 2×684515412044² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 684515411986 and 684515412004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3103622 + ... + 3316850.

It is an arithmetic number, because the mean of its divisors is an integer number (51524897200).

Almost surely, 2^684515412044 is an apocalyptic number.

It is an amenable number.

684515412044 is a deficient number, since it is larger than the sum of its proper divisors (552082120756).

684515412044 is a wasteful number, since it uses less digits than its factorization.

684515412044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239153 (or 239151 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 44.

The spelling of 684515412044 in words is "six hundred eighty-four billion, five hundred fifteen million, four hundred twelve thousand, forty-four".