1690287926645 has 8 divisors (see below), whose sum is σ = 2135100539040. Its totient is φ = 1281060323280.

The previous prime is 1690287926627. The next prime is 1690287926687. The reversal of 1690287926645 is 5466297820961.

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

It is not a de Polignac number, because 1690287926645 - 2⁸ = 1690287926389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8896252151 + ... + 8896252340.

It is an arithmetic number, because the mean of its divisors is an integer number (266887567380).

Almost surely, 2^{1690287926645} is an apocalyptic number.

It is an amenable number.

1690287926645 is a deficient number, since it is larger than the sum of its proper divisors (444812612395).

1690287926645 is a wasteful number, since it uses less digits than its factorization.

1690287926645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17792504515.

The product of its (nonzero) digits is 78382080, while the sum is 65.

The spelling of 1690287926645 in words is "one trillion, six hundred ninety billion, two hundred eighty-seven million, nine hundred twenty-six thousand, six hundred forty-five".