681476887969 has 8 divisors (see below), whose sum is σ = 688288689000. Its totient is φ = 674675263872.

The previous prime is 681476887967. The next prime is 681476887979. The reversal of 681476887969 is 969788674186.

It can be written as a sum of positive squares in 4 ways, for example, as 576176637969 + 105300250000 = 759063^2 + 324500^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 681476887969 - 2¹ = 681476887967 is a prime.

It is a super-2 number, since 2×681476887969² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681476887963) 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, 2409604 + ... + 2677525.

It is an arithmetic number, because the mean of its divisors is an integer number (86036086125).

Almost surely, 2^681476887969 is an apocalyptic number.

It is an amenable number.

681476887969 is a deficient number, since it is larger than the sum of its proper divisors (6811801031).

681476887969 is a wasteful number, since it uses less digits than its factorization.

681476887969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088467.

The product of its digits is 1755758592, while the sum is 79.

The spelling of 681476887969 in words is "six hundred eighty-one billion, four hundred seventy-six million, eight hundred eighty-seven thousand, nine hundred sixty-nine".