3355507784681 has 18 divisors (see below), whose sum is σ = 3763091803770. Its totient is φ = 2990585060736.

The previous prime is 3355507784677. The next prime is 3355507784683. The reversal of 3355507784681 is 1864877055533.

It can be written as a sum of positive squares in 9 ways, for example, as 2231017208281 + 1124490576400 = 1493659^2 + 1060420^2 .

It is not a de Polignac number, because 3355507784681 - 2² = 3355507784677 is a prime.

It is a super-2 number, since 2×3355507784681² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3355507784683) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11662316 + ... + 11946573.

It is an arithmetic number, because the mean of its divisors is an integer number (209060655765).

Almost surely, 2^{3355507784681} is an apocalyptic number.

It is an amenable number.

3355507784681 is a deficient number, since it is larger than the sum of its proper divisors (407584019089).

3355507784681 is a wasteful number, since it uses less digits than its factorization.

3355507784681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23608973 (or 23608931 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 62.

The spelling of 3355507784681 in words is "three trillion, three hundred fifty-five billion, five hundred seven million, seven hundred eighty-four thousand, six hundred eighty-one".