3456781255669 has 16 divisors (see below), whose sum is σ = 4180434278400. Its totient is φ = 2794213865520.

The previous prime is 3456781255667. The next prime is 3456781255747. The reversal of 3456781255669 is 9665521876543.

It is not a de Polignac number, because 3456781255669 - 2¹ = 3456781255667 is a prime.

It is a super-2 number, since 2×3456781255669² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3456781255661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151190619 + ... + 151213480.

It is an arithmetic number, because the mean of its divisors is an integer number (261277142400).

Almost surely, 2^{3456781255669} is an apocalyptic number.

It is an amenable number.

3456781255669 is a deficient number, since it is larger than the sum of its proper divisors (723653022731).

3456781255669 is a wasteful number, since it uses less digits than its factorization.

3456781255669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302404200.

The product of its digits is 326592000, while the sum is 67.

The spelling of 3456781255669 in words is "three trillion, four hundred fifty-six billion, seven hundred eighty-one million, two hundred fifty-five thousand, six hundred sixty-nine".