694887481440 has 144 divisors (see below), whose sum is σ = 2375213113728. Its totient is φ = 184997818368.

The previous prime is 694887481427. The next prime is 694887481471. The reversal of 694887481440 is 44184788496.

694887481440 is a `hidden beast` number, since 6 + 9 + 48 + 8 + 74 + 81 + 440 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×694887481440² (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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476584 + ... + 1271576.

It is an arithmetic number, because the mean of its divisors is an integer number (16494535512).

Almost surely, 2^694887481440 is an apocalyptic number.

694887481440 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 694887481440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187606556864).

694887481440 is an abundant number, since it is smaller than the sum of its proper divisors (1680325632288).

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

694887481440 is a wasteful number, since it uses less digits than its factorization.

694887481440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795621 (or 795610 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 63.

The spelling of 694887481440 in words is "six hundred ninety-four billion, eight hundred eighty-seven million, four hundred eighty-one thousand, four hundred forty".