690452056980 has 576 divisors, whose sum is σ = 2542442273280. Its totient is φ = 148345344000.

The previous prime is 690452056979. The next prime is 690452057003. The reversal of 690452056980 is 89650254096.

It is a happy number.

690452056980 is a `hidden beast` number, since 69 + 0 + 4 + 520 + 56 + 9 + 8 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 225121407 + ... + 225124473.

It is an arithmetic number, because the mean of its divisors is an integer number (4413962280).

Almost surely, 2^690452056980 is an apocalyptic number.

690452056980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690452056980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1271221136640).

690452056980 is an abundant number, since it is smaller than the sum of its proper divisors (1851990216300).

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

690452056980 is a wasteful number, since it uses less digits than its factorization.

690452056980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3280 (or 3275 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 690452056980 in words is "six hundred ninety billion, four hundred fifty-two million, fifty-six thousand, nine hundred eighty".