1955806838954 has 4 divisors (see below), whose sum is σ = 2933710258434. Its totient is φ = 977903419476.

The previous prime is 1955806838933. The next prime is 1955806839029. The reversal of 1955806838954 is 4598386085591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1851137119225 + 104669719729 = 1360565^2 + 323527^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488951709737 + ... + 488951709740.

Almost surely, 2^{1955806838954} is an apocalyptic number.

1955806838954 is a deficient number, since it is larger than the sum of its proper divisors (977903419480).

1955806838954 is an equidigital number, since it uses as much as digits as its factorization.

1955806838954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977903419479.

The product of its (nonzero) digits is 373248000, while the sum is 71.

The spelling of 1955806838954 in words is "one trillion, nine hundred fifty-five billion, eight hundred six million, eight hundred thirty-eight thousand, nine hundred fifty-four".