690822251406 has 192 divisors, whose sum is σ = 1780900992000. Its totient is φ = 193387207104.

The previous prime is 690822251393. The next prime is 690822251417. The reversal of 690822251406 is 604152228096.

It is a congruent number.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 473489505 + ... + 473490963.

It is an arithmetic number, because the mean of its divisors is an integer number (9275526000).

Almost surely, 2^690822251406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690822251406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (890450496000).

690822251406 is an abundant number, since it is smaller than the sum of its proper divisors (1090078740594).

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

690822251406 is a wasteful number, since it uses less digits than its factorization.

690822251406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988 (or 2971 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 690822251406 in words is "six hundred ninety billion, eight hundred twenty-two million, two hundred fifty-one thousand, four hundred six".