698861081601 has 16 divisors (see below), whose sum is σ = 1035371881920. Its totient is φ = 465897428640.

The previous prime is 698861081593. The next prime is 698861081603. The reversal of 698861081601 is 106180168896.

698861081601 is a `hidden beast` number, since 6 + 9 + 8 + 8 + 610 + 8 + 16 + 0 + 1 = 666.

It is not a de Polignac number, because 698861081601 - 2³ = 698861081593 is a prime.

It is a super-2 number, since 2×698861081601² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (698861081603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1142166 + ... + 1643856.

It is an arithmetic number, because the mean of its divisors is an integer number (64710742620).

Almost surely, 2^698861081601 is an apocalyptic number.

It is an amenable number.

698861081601 is a deficient number, since it is larger than the sum of its proper divisors (336510800319).

698861081601 is a wasteful number, since it uses less digits than its factorization.

698861081601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553293 (or 553287 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The spelling of 698861081601 in words is "six hundred ninety-eight billion, eight hundred sixty-one million, eighty-one thousand, six hundred one".