690911615017 has 4 divisors (see below), whose sum is σ = 744058662340. Its totient is φ = 637764567696.

The previous prime is 690911614993. The next prime is 690911615029. The reversal of 690911615017 is 710516119096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 133583671081 + 557327943936 = 365491^2 + 746544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690911615017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690911619017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26573523642 + ... + 26573523667.

It is an arithmetic number, because the mean of its divisors is an integer number (186014665585).

Almost surely, 2^690911615017 is an apocalyptic number.

It is an amenable number.

690911615017 is a deficient number, since it is larger than the sum of its proper divisors (53147047323).

690911615017 is a wasteful number, since it uses less digits than its factorization.

690911615017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53147047322.

The product of its (nonzero) digits is 102060, while the sum is 46.

The spelling of 690911615017 in words is "six hundred ninety billion, nine hundred eleven million, six hundred fifteen thousand, seventeen".