1693402947864 has 96 divisors (see below), whose sum is σ = 4736686032000. Its totient is φ = 545977336320.

The previous prime is 1693402947779. The next prime is 1693402947869. The reversal of 1693402947864 is 4687492043961.

It is a happy number.

1693402947864 is a `hidden beast` number, since 1 + 69 + 3 + 40 + 2 + 9 + 478 + 64 = 666.

It is a super-2 number, since 2×1693402947864² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1693402947869) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4155532 + ... + 4544804.

It is an arithmetic number, because the mean of its divisors is an integer number (49340479500).

Almost surely, 2^{1693402947864} 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 1693402947864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2368343016000).

1693402947864 is an abundant number, since it is smaller than the sum of its proper divisors (3043283084136).

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

1693402947864 is a wasteful number, since it uses less digits than its factorization.

1693402947864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391265 (or 391258 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 1693402947864 in words is "one trillion, six hundred ninety-three billion, four hundred two million, nine hundred forty-seven thousand, eight hundred sixty-four".