681909070909146 has 16 divisors (see below), whose sum is σ = 1371437237584800. Its totient is φ = 226033174341968.

The previous prime is 681909070909117. The next prime is 681909070909147. The reversal of 681909070909146 is 641909070909186.

It is not an unprimeable number, because it can be changed into a prime (681909070909147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317462322441 + ... + 317462324588.

It is an arithmetic number, because the mean of its divisors is an integer number (85714827349050).

Almost surely, 2^{681909070909146} is an apocalyptic number.

681909070909146 is an abundant number, since it is smaller than the sum of its proper divisors (689528166675654).

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

681909070909146 is a wasteful number, since it uses less digits than its factorization.

681909070909146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634924647213.

The product of its (nonzero) digits is 52907904, while the sum is 69.

The spelling of 681909070909146 in words is "six hundred eighty-one trillion, nine hundred nine billion, seventy million, nine hundred nine thousand, one hundred forty-six".