1948955977571 has 2 divisors, whose sum is σ = 1948955977572. Its totient is φ = 1948955977570.

The previous prime is 1948955977511. The next prime is 1948955977627. The reversal of 1948955977571 is 1757795598491.

It is a strong prime.

It is an emirp because it is prime and its reverse (1757795598491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1948955977571 - 2¹⁴ = 1948955961187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1948955977492 and 1948955977501.

It is not a weakly prime, because it can be changed into another prime (1948955977511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 974477988785 + 974477988786.

It is an arithmetic number, because the mean of its divisors is an integer number (974477988786).

Almost surely, 2^{1948955977571} is an apocalyptic number.

1948955977571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1948955977571 is an equidigital number, since it uses as much as digits as its factorization.

1948955977571 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000188000, while the sum is 77.

The spelling of 1948955977571 in words is "one trillion, nine hundred forty-eight billion, nine hundred fifty-five million, nine hundred seventy-seven thousand, five hundred seventy-one".