2955591781 has 2 divisors, whose sum is σ = 2955591782. Its totient is φ = 2955591780.

The previous prime is 2955591773. The next prime is 2955591787. The reversal of 2955591781 is 1871955592.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1616763681 + 1338828100 = 40209^2 + 36590^2 .

It is a cyclic number.

It is not a de Polignac number, because 2955591781 - 2³ = 2955591773 is a prime.

It is a super-2 number, since 2×2955591781² = 17471045551829503922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2955591787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1477795890 + 1477795891.

It is an arithmetic number, because the mean of its divisors is an integer number (1477795891).

Almost surely, 2^2955591781 is an apocalyptic number.

It is an amenable number.

2955591781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2955591781 is an equidigital number, since it uses as much as digits as its factorization.

2955591781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1134000, while the sum is 52.

The square root of 2955591781 is about 54365.3546019889. The cubic root of 2955591781 is about 1435.0977495360.

The spelling of 2955591781 in words is "two billion, nine hundred fifty-five million, five hundred ninety-one thousand, seven hundred eighty-one".