84621560801684 has 6 divisors (see below), whose sum is σ = 148087731402954. Its totient is φ = 42310780400840.

The previous prime is 84621560801671. The next prime is 84621560801717. The reversal of 84621560801684 is 48610806512648.

It can be written as a sum of positive squares in only one way, i.e., 64914797808784 + 19706762992900 = 8056972^2 + 4439230^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10577695100207 + ... + 10577695100214.

It is an arithmetic number, because the mean of its divisors is an integer number (24681288567159).

Almost surely, 2^{84621560801684} is an apocalyptic number.

It is an amenable number.

84621560801684 is a deficient number, since it is larger than the sum of its proper divisors (63466170601270).

84621560801684 is a wasteful number, since it uses less digits than its factorization.

84621560801684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21155390200425 (or 21155390200423 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 59.

The spelling of 84621560801684 in words is "eighty-four trillion, six hundred twenty-one billion, five hundred sixty million, eight hundred one thousand, six hundred eighty-four".