1955111677 has 2 divisors, whose sum is σ = 1955111678. Its totient is φ = 1955111676.

The previous prime is 1955111651. The next prime is 1955111699. The reversal of 1955111677 is 7761115591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1878268921 + 76842756 = 43339^2 + 8766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955111677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955111617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977555838 + 977555839.

It is an arithmetic number, because the mean of its divisors is an integer number (977555839).

Almost surely, 2^1955111677 is an apocalyptic number.

It is an amenable number.

1955111677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955111677 is an equidigital number, since it uses as much as digits as its factorization.

1955111677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 66150, while the sum is 43.

The square root of 1955111677 is about 44216.6447958232. The cubic root of 1955111677 is about 1250.4236808061.

The spelling of 1955111677 in words is "one billion, nine hundred fifty-five million, one hundred eleven thousand, six hundred seventy-seven".