1690417677721 has 16 divisors (see below), whose sum is σ = 1840892803200. Its totient is φ = 1546101986688.

The previous prime is 1690417677691. The next prime is 1690417677763. The reversal of 1690417677721 is 1277767140961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1690417677721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1690417677521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7144116 + ... + 7376938.

It is an arithmetic number, because the mean of its divisors is an integer number (115055800200).

Almost surely, 2^{1690417677721} is an apocalyptic number.

It is an amenable number.

1690417677721 is a deficient number, since it is larger than the sum of its proper divisors (150475125479).

1690417677721 is a wasteful number, since it uses less digits than its factorization.

1690417677721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246048.

The product of its (nonzero) digits is 6223392, while the sum is 58.

The spelling of 1690417677721 in words is "one trillion, six hundred ninety billion, four hundred seventeen million, six hundred seventy-seven thousand, seven hundred twenty-one".