1955209447419 has 16 divisors (see below), whose sum is σ = 2633906580480. Its totient is φ = 1289993506560.

The previous prime is 1955209447403. The next prime is 1955209447427. The reversal of 1955209447419 is 9147449025591.

It is not a de Polignac number, because 1955209447419 - 2⁴ = 1955209447403 is a prime.

It is a super-3 number, since 3×1955209447419³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (1955209447459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10826142 + ... + 11005260.

It is an arithmetic number, because the mean of its divisors is an integer number (164619161280).

Almost surely, 2^{1955209447419} is an apocalyptic number.

1955209447419 is a deficient number, since it is larger than the sum of its proper divisors (678697133061).

1955209447419 is a wasteful number, since it uses less digits than its factorization.

1955209447419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216730.

The product of its (nonzero) digits is 16329600, while the sum is 60.

The spelling of 1955209447419 in words is "one trillion, nine hundred fifty-five billion, two hundred nine million, four hundred forty-seven thousand, four hundred nineteen".