4197781652 has 24 divisors (see below), whose sum is σ = 7437494400. Its totient is φ = 2072941056.

The previous prime is 4197781613. The next prime is 4197781667. The reversal of 4197781652 is 2561877914.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4197781652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87749 + ... + 126867.

It is an arithmetic number, because the mean of its divisors is an integer number (309895600).

Almost surely, 2^4197781652 is an apocalyptic number.

It is an amenable number.

4197781652 is a deficient number, since it is larger than the sum of its proper divisors (3239712748).

4197781652 is a wasteful number, since it uses less digits than its factorization.

4197781652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39455 (or 39453 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 4197781652 is about 64790.2897971602. The cubic root of 4197781652 is about 1613.1445367756.

The spelling of 4197781652 in words is "four billion, one hundred ninety-seven million, seven hundred eighty-one thousand, six hundred fifty-two".