690241923861 has 16 divisors (see below), whose sum is σ = 1051828697088. Its totient is φ = 394412151600.

The previous prime is 690241923851. The next prime is 690241923869. The reversal of 690241923861 is 168329142096.

It is not a de Polignac number, because 690241923861 - 2⁵ = 690241923829 is a prime.

It is a super-2 number, since 2×690241923861² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690241923869) 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, 252696 + ... + 1201806.

It is an arithmetic number, because the mean of its divisors is an integer number (65739293568).

Almost surely, 2^690241923861 is an apocalyptic number.

It is an amenable number.

690241923861 is a deficient number, since it is larger than the sum of its proper divisors (361586773227).

690241923861 is a wasteful number, since it uses less digits than its factorization.

690241923861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983752.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The spelling of 690241923861 in words is "six hundred ninety billion, two hundred forty-one million, nine hundred twenty-three thousand, eight hundred sixty-one".