3855506491 has 16 divisors (see below), whose sum is σ = 4170138624. Its totient is φ = 3555471744.

The previous prime is 3855506489. The next prime is 3855506509. The reversal of 3855506491 is 1946055583.

It is not a de Polignac number, because 3855506491 - 2¹ = 3855506489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3855506401) 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, 45811 + ... + 99043.

It is an arithmetic number, because the mean of its divisors is an integer number (260633664).

Almost surely, 2^3855506491 is an apocalyptic number.

3855506491 is a deficient number, since it is larger than the sum of its proper divisors (314632133).

3855506491 is a wasteful number, since it uses less digits than its factorization.

3855506491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53370.

The product of its (nonzero) digits is 648000, while the sum is 46.

The square root of 3855506491 is about 62092.7249442316. The cubic root of 3855506491 is about 1568.0520679110.

The spelling of 3855506491 in words is "three billion, eight hundred fifty-five million, five hundred six thousand, four hundred ninety-one".