691926016 has 44 divisors (see below), whose sum is σ = 1386842500. Its totient is φ = 345047040.

The previous prime is 691925999. The next prime is 691926023. The reversal of 691926016 is 610629196.

It can be written as a sum of positive squares in 2 ways, for example, as 279023616 + 412902400 = 16704^2 + 20320^2 .

It is a super-2 number, since 2×691926016² = 957523223235264512, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 691926016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553360 + ... + 554608.

Almost surely, 2^691926016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 691926016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693421250).

691926016 is an abundant number, since it is smaller than the sum of its proper divisors (694916484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

691926016 is a wasteful number, since it uses less digits than its factorization.

691926016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 691926016 is about 26304.4866135038. The cubic root of 691926016 is about 884.4770191523.

The spelling of 691926016 in words is "six hundred ninety-one million, nine hundred twenty-six thousand, sixteen".