681144104 has 8 divisors (see below), whose sum is σ = 1277145210. Its totient is φ = 340572048.

The previous prime is 681144097. The next prime is 681144127. The reversal of 681144104 is 401441186.

It can be written as a sum of positive squares in only one way, i.e., 587092900 + 94051204 = 24230^2 + 9698^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42571499 + ... + 42571514.

Almost surely, 2^681144104 is an apocalyptic number.

It is an amenable number.

681144104 is a deficient number, since it is larger than the sum of its proper divisors (596001106).

681144104 is a wasteful number, since it uses less digits than its factorization.

681144104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85143019 (or 85143015 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 681144104 is about 26098.7375939910. The cubic root of 681144104 is about 879.8588375499.

The spelling of 681144104 in words is "six hundred eighty-one million, one hundred forty-four thousand, one hundred four".