681990501001 has 8 divisors (see below), whose sum is σ = 683356497408. Its totient is φ = 680624724000.

The previous prime is 681990500911. The next prime is 681990501007. The reversal of 681990501001 is 100105099186.

681990501001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 681990501001 - 2⁹ = 681990500489 is a prime.

It is a super-2 number, since 2×681990501001² (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 (681990501007) 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, 7095696 + ... + 7191166.

It is an arithmetic number, because the mean of its divisors is an integer number (85419562176).

Almost surely, 2^681990501001 is an apocalyptic number.

It is an amenable number.

681990501001 is a deficient number, since it is larger than the sum of its proper divisors (1365996407).

681990501001 is a wasteful number, since it uses less digits than its factorization.

681990501001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109703.

The product of its (nonzero) digits is 19440, while the sum is 40.

The spelling of 681990501001 in words is "six hundred eighty-one billion, nine hundred ninety million, five hundred one thousand, one".