690805891651111 has 8 divisors (see below), whose sum is σ = 693516656004480. Its totient is φ = 688095764616312.

The previous prime is 690805891651049. The next prime is 690805891651181. The reversal of 690805891651111 is 111156198508096.

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 690805891651111 - 2²¹ = 690805889553959 is a prime.

It is a super-3 number, since 3×690805891651111³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 690805891651111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690805891651181) 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, 157157481 + ... + 161493298.

It is an arithmetic number, because the mean of its divisors is an integer number (86689582000560).

Almost surely, 2^{690805891651111} is an apocalyptic number.

690805891651111 is a deficient number, since it is larger than the sum of its proper divisors (2710764353369).

690805891651111 is a wasteful number, since it uses less digits than its factorization.

690805891651111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318659285.

The product of its (nonzero) digits is 4665600, while the sum is 61.

The spelling of 690805891651111 in words is "six hundred ninety trillion, eight hundred five billion, eight hundred ninety-one million, six hundred fifty-one thousand, one hundred eleven".