3401538561 has 6 divisors (see below), whose sum is σ = 4913333490. Its totient is φ = 2267692368.

The previous prime is 3401538559. The next prime is 3401538571. The reversal of 3401538561 is 1658351043.

3401538561 is a `hidden beast` number, since 3 + 40 + 1 + 53 + 8 + 561 = 666.

3401538561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1795132161 + 1606406400 = 42369^2 + 40080^2 .

It is not a de Polignac number, because 3401538561 - 2¹ = 3401538559 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3401538541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188974356 + ... + 188974373.

It is an arithmetic number, because the mean of its divisors is an integer number (818888915).

Almost surely, 2^3401538561 is an apocalyptic number.

It is an amenable number.

3401538561 is a deficient number, since it is larger than the sum of its proper divisors (1511794929).

3401538561 is a wasteful number, since it uses less digits than its factorization.

3401538561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377948735 (or 377948732 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 3401538561 is about 58322.7105080002. The cubic root of 3401538561 is about 1503.9213782617.

The spelling of 3401538561 in words is "three billion, four hundred one million, five hundred thirty-eight thousand, five hundred sixty-one".