690208400684544 has 480 divisors, whose sum is σ = 2263398671356416. Its totient is φ = 185971611893760.

The previous prime is 690208400684501. The next prime is 690208400684549. The reversal of 690208400684544 is 445486004802096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690208400684549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120098244 + ... + 125713980.

Almost surely, 2^{690208400684544} is an apocalyptic number.

690208400684544 is a gapful number since it is divisible by the number (64) 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 690208400684544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1131699335678208).

690208400684544 is an abundant number, since it is smaller than the sum of its proper divisors (1573190270671872).

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

690208400684544 is a wasteful number, since it uses less digits than its factorization.

690208400684544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615866 (or 5615843 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 60.

The spelling of 690208400684544 in words is "six hundred ninety trillion, two hundred eight billion, four hundred million, six hundred eighty-four thousand, five hundred forty-four".