1550851957 has 2 divisors, whose sum is σ = 1550851958. Its totient is φ = 1550851956.

The previous prime is 1550851933. The next prime is 1550851963. The reversal of 1550851957 is 7591580551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1473868881 + 76983076 = 38391^2 + 8774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1550851957 - 2²⁷ = 1416634229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1550858957) 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 as a sum of consecutive naturals, namely, 775425978 + 775425979.

It is an arithmetic number, because the mean of its divisors is an integer number (775425979).

Almost surely, 2^1550851957 is an apocalyptic number.

It is an amenable number.

1550851957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1550851957 is an equidigital number, since it uses as much as digits as its factorization.

1550851957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315000, while the sum is 46.

The square root of 1550851957 is about 39380.8577484036. The cubic root of 1550851957 is about 1157.5065239476.

The spelling of 1550851957 in words is "one billion, five hundred fifty million, eight hundred fifty-one thousand, nine hundred fifty-seven".