3854155261685 has 4 divisors (see below), whose sum is σ = 4624986314028. Its totient is φ = 3083324209344.

The previous prime is 3854155261673. The next prime is 3854155261709. The reversal of 3854155261685 is 5861625514583.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1646740828516 + 2207414433169 = 1283254^2 + 1485737^2 .

It is a cyclic number.

It is not a de Polignac number, because 3854155261685 - 2²⁰ = 3854154213109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385415526164 + ... + 385415526173.

It is an arithmetic number, because the mean of its divisors is an integer number (1156246578507).

Almost surely, 2^{3854155261685} is an apocalyptic number.

It is an amenable number.

3854155261685 is a deficient number, since it is larger than the sum of its proper divisors (770831052343).

3854155261685 is an equidigital number, since it uses as much as digits as its factorization.

3854155261685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770831052342.

The product of its digits is 34560000, while the sum is 59.

The spelling of 3854155261685 in words is "three trillion, eight hundred fifty-four billion, one hundred fifty-five million, two hundred sixty-one thousand, six hundred eighty-five".