1855870047 has 6 divisors (see below), whose sum is σ = 2680701192. Its totient is φ = 1237246692.

The previous prime is 1855870019. The next prime is 1855870061. The reversal of 1855870047 is 7400785581.

It is a happy number.

It is not a de Polignac number, because 1855870047 - 2¹⁴ = 1855853663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1855869984 and 1855870011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855870147) 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 5 ways as a sum of consecutive naturals, for example, 103103883 + ... + 103103900.

It is an arithmetic number, because the mean of its divisors is an integer number (446783532).

Almost surely, 2^1855870047 is an apocalyptic number.

1855870047 is a deficient number, since it is larger than the sum of its proper divisors (824831145).

1855870047 is a wasteful number, since it uses less digits than its factorization.

1855870047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206207789 (or 206207786 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 1855870047 is about 43079.8102015318. The cubic root of 1855870047 is about 1228.8980473643.

The spelling of 1855870047 in words is "one billion, eight hundred fifty-five million, eight hundred seventy thousand, forty-seven".