3378400561 has 4 divisors (see below), whose sum is σ = 3450281472. Its totient is φ = 3306519652.

The previous prime is 3378400549. The next prime is 3378400591. The reversal of 3378400561 is 1650048733.

3378400561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3378400561 - 2¹⁹ = 3377876273 is a prime.

It is a super-2 number, since 2×3378400561² = 22827180701130229442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3378400561.

It is not an unprimeable number, because it can be changed into a prime (3378400591) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35940385 + ... + 35940478.

It is an arithmetic number, because the mean of its divisors is an integer number (862570368).

Almost surely, 2^3378400561 is an apocalyptic number.

It is an amenable number.

3378400561 is a deficient number, since it is larger than the sum of its proper divisors (71880911).

3378400561 is an equidigital number, since it uses as much as digits as its factorization.

3378400561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71880910.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 3378400561 is about 58124.0101937229. The cubic root of 3378400561 is about 1500.5036177087.

The spelling of 3378400561 in words is "three billion, three hundred seventy-eight million, four hundred thousand, five hundred sixty-one".