1955148490027 has 2 divisors, whose sum is σ = 1955148490028. Its totient is φ = 1955148490026.

The previous prime is 1955148490007. The next prime is 1955148490063. The reversal of 1955148490027 is 7200948415591.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955148490027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1955148490027.

It is not a weakly prime, because it can be changed into another prime (1955148490007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977574245013 + 977574245014.

It is an arithmetic number, because the mean of its divisors is an integer number (977574245014).

Almost surely, 2^{1955148490027} is an apocalyptic number.

1955148490027 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955148490027 is an equidigital number, since it uses as much as digits as its factorization.

1955148490027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 55.

The spelling of 1955148490027 in words is "one trillion, nine hundred fifty-five billion, one hundred forty-eight million, four hundred ninety thousand, twenty-seven".