3694430781440 has 912 divisors, whose sum is σ = 11205917400384. Its totient is φ = 1162661068800.

The previous prime is 3694430781409. The next prime is 3694430781473. The reversal of 3694430781440 is 441870344963.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60564439010 + ... + 60564439070.

It is an arithmetic number, because the mean of its divisors is an integer number (12287190132).

Almost surely, 2^{3694430781440} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3694430781440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5602958700192).

3694430781440 is an abundant number, since it is smaller than the sum of its proper divisors (7511486618944).

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

3694430781440 is an frugal number, since it uses more digits than its factorization.

3694430781440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 53.

The spelling of 3694430781440 in words is "three trillion, six hundred ninety-four billion, four hundred thirty million, seven hundred eighty-one thousand, four hundred forty".