1955480591 has 2 divisors, whose sum is σ = 1955480592. Its totient is φ = 1955480590.

The previous prime is 1955480567. The next prime is 1955480603. The reversal of 1955480591 is 1950845591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1955480591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955480561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977740295 + 977740296.

It is an arithmetic number, because the mean of its divisors is an integer number (977740296).

Almost surely, 2^1955480591 is an apocalyptic number.

1955480591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955480591 is an equidigital number, since it uses as much as digits as its factorization.

1955480591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 47.

The square root of 1955480591 is about 44220.8162633844. The cubic root of 1955480591 is about 1250.5023241893.

The spelling of 1955480591 in words is "one billion, nine hundred fifty-five million, four hundred eighty thousand, five hundred ninety-one".