690849858321 has 24 divisors (see below), whose sum is σ = 1200474275520. Its totient is φ = 373993907616.

The previous prime is 690849858313. The next prime is 690849858401. The reversal of 690849858321 is 123858948096.

690849858321 is a `hidden beast` number, since 6 + 9 + 0 + 8 + 49 + 8 + 583 + 2 + 1 = 666.

It is not a de Polignac number, because 690849858321 - 2³ = 690849858313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (690849858521) 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 23 ways as a sum of consecutive naturals, for example, 288574350 + ... + 288576743.

It is an arithmetic number, because the mean of its divisors is an integer number (50019761480).

Almost surely, 2^690849858321 is an apocalyptic number.

It is an amenable number.

690849858321 is a deficient number, since it is larger than the sum of its proper divisors (509624417199).

690849858321 is a wasteful number, since it uses less digits than its factorization.

690849858321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577151125 (or 577151122 counting only the distinct ones).

The product of its (nonzero) digits is 29859840, while the sum is 63.

The spelling of 690849858321 in words is "six hundred ninety billion, eight hundred forty-nine million, eight hundred fifty-eight thousand, three hundred twenty-one".