1555048457 has 2 divisors, whose sum is σ = 1555048458. Its totient is φ = 1555048456.

The previous prime is 1555048433. The next prime is 1555048471. The reversal of 1555048457 is 7548405551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1407450256 + 147598201 = 37516^2 + 12149^2 .

It is an emirp because it is prime and its reverse (7548405551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555048457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1555048477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777524228 + 777524229.

It is an arithmetic number, because the mean of its divisors is an integer number (777524229).

Almost surely, 2^1555048457 is an apocalyptic number.

It is an amenable number.

1555048457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1555048457 is an equidigital number, since it uses as much as digits as its factorization.

1555048457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560000, while the sum is 44.

The square root of 1555048457 is about 39434.1027157966. The cubic root of 1555048457 is about 1158.5496283193.

The spelling of 1555048457 in words is "one billion, five hundred fifty-five million, forty-eight thousand, four hundred fifty-seven".