1655803851 has 32 divisors (see below), whose sum is σ = 2420716032. Its totient is φ = 1000581120.

The previous prime is 1655803841. The next prime is 1655803861. The reversal of 1655803851 is 1583085561.

It is an interprime number because it is at equal distance from previous prime (1655803841) and next prime (1655803861).

It is not a de Polignac number, because 1655803851 - 2⁹ = 1655803339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1655803841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 782571 + ... + 784683.

It is an arithmetic number, because the mean of its divisors is an integer number (75647376).

Almost surely, 2^1655803851 is an apocalyptic number.

1655803851 is a deficient number, since it is larger than the sum of its proper divisors (764912181).

1655803851 is a wasteful number, since it uses less digits than its factorization.

1655803851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2483.

The product of its (nonzero) digits is 144000, while the sum is 42.

The square root of 1655803851 is about 40691.5697780265. The cubic root of 1655803851 is about 1183.0496265088.

The spelling of 1655803851 in words is "one billion, six hundred fifty-five million, eight hundred three thousand, eight hundred fifty-one".