681265812190 has 8 divisors (see below), whose sum is σ = 1226278461960. Its totient is φ = 272506324872.

The previous prime is 681265812187. The next prime is 681265812191. The reversal of 681265812190 is 91218562186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×681265812190² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681265812191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34063290600 + ... + 34063290619.

It is an arithmetic number, because the mean of its divisors is an integer number (153284807745).

Almost surely, 2^681265812190 is an apocalyptic number.

681265812190 is a deficient number, since it is larger than the sum of its proper divisors (545012649770).

681265812190 is a wasteful number, since it uses less digits than its factorization.

681265812190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68126581226.

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 681265812190 in words is "six hundred eighty-one billion, two hundred sixty-five million, eight hundred twelve thousand, one hundred ninety".