681454505454186 has 16 divisors (see below), whose sum is σ = 1362910745674368. Its totient is φ = 227151212690400.

The previous prime is 681454505454113. The next prime is 681454505454197.

681454505454186 is nontrivially palindromic in base 10.

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, 67147170 + ... + 76626701.

It is an arithmetic number, because the mean of its divisors is an integer number (85181921604648).

Almost surely, 2^{681454505454186} is an apocalyptic number.

681454505454186 is an abundant number, since it is smaller than the sum of its proper divisors (681456240220182).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681454505454186 is a wasteful number, since it uses less digits than its factorization.

681454505454186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144563837.

The product of its (nonzero) digits is 368640000, while the sum is 66.

The spelling of 681454505454186 in words is "six hundred eighty-one trillion, four hundred fifty-four billion, five hundred five million, four hundred fifty-four thousand, one hundred eighty-six".