690687819100 has 36 divisors (see below), whose sum is σ = 1510233760728. Its totient is φ = 274166152000.

The previous prime is 690687819011. The next prime is 690687819137. The reversal of 690687819100 is 1918786096.

It is a super-2 number, since 2×690687819100² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26349031 + ... + 26375230.

It is an arithmetic number, because the mean of its divisors is an integer number (41950937798).

Almost surely, 2^690687819100 is an apocalyptic number.

It is an amenable number.

690687819100 is an abundant number, since it is smaller than the sum of its proper divisors (819545941628).

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

690687819100 is a wasteful number, since it uses less digits than its factorization.

690687819100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52724406 (or 52724399 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 55.

The spelling of 690687819100 in words is "six hundred ninety billion, six hundred eighty-seven million, eight hundred nineteen thousand, one hundred".