855955537 has 2 divisors, whose sum is σ = 855955538. Its totient is φ = 855955536.

The previous prime is 855955531. The next prime is 855955547. The reversal of 855955537 is 735559558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 430936081 + 425019456 = 20759^2 + 20616^2 .

It is a cyclic number.

It is not a de Polignac number, because 855955537 - 2⁷ = 855955409 is a prime.

It is not a weakly prime, because it can be changed into another prime (855955531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427977768 + 427977769.

It is an arithmetic number, because the mean of its divisors is an integer number (427977769).

Almost surely, 2^855955537 is an apocalyptic number.

It is an amenable number.

855955537 is a deficient number, since it is larger than the sum of its proper divisors (1).

855955537 is an equidigital number, since it uses as much as digits as its factorization.

855955537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4725000, while the sum is 52.

The square root of 855955537 is about 29256.7178097612. The cubic root of 855955537 is about 949.4754396780.

The spelling of 855955537 in words is "eight hundred fifty-five million, nine hundred fifty-five thousand, five hundred thirty-seven".