3468808581561 has 6 divisors (see below), whose sum is σ = 5010501284490. Its totient is φ = 2312539054368.

The previous prime is 3468808581541. The next prime is 3468808581577. The reversal of 3468808581561 is 1651858088643.

3468808581561 is a `hidden beast` number, since 3 + 4 + 68 + 8 + 0 + 8 + 5 + 8 + 1 + 561 = 666.

3468808581561 is digitally balanced in base 3, 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., 2451867432336 + 1016941149225 = 1565844^2 + 1008435^2 .

It is not a de Polignac number, because 3468808581561 - 2¹³ = 3468808573369 is a prime.

It is a super-2 number, since 2×3468808581561² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3468808581541) 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, 192711587856 + ... + 192711587873.

It is an arithmetic number, because the mean of its divisors is an integer number (835083547415).

Almost surely, 2^{3468808581561} is an apocalyptic number.

It is an amenable number.

3468808581561 is a deficient number, since it is larger than the sum of its proper divisors (1541692702929).

3468808581561 is a wasteful number, since it uses less digits than its factorization.

3468808581561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385423175735 (or 385423175732 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 63.

The spelling of 3468808581561 in words is "three trillion, four hundred sixty-eight billion, eight hundred eight million, five hundred eighty-one thousand, five hundred sixty-one".