1955009804501 has 4 divisors (see below), whose sum is σ = 2105395174092. Its totient is φ = 1804624434912.

The previous prime is 1955009804491. The next prime is 1955009804543. The reversal of 1955009804501 is 1054089005591.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 908380548100 + 1046629256401 = 953090^2 + 1023049^2 .

It is not a de Polignac number, because 1955009804501 - 2⁶ = 1955009804437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955009804581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75192684776 + ... + 75192684801.

It is an arithmetic number, because the mean of its divisors is an integer number (526348793523).

Almost surely, 2^{1955009804501} is an apocalyptic number.

It is an amenable number.

1955009804501 is a deficient number, since it is larger than the sum of its proper divisors (150385369591).

1955009804501 is a wasteful number, since it uses less digits than its factorization.

1955009804501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150385369590.

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

It can be divided in two parts, 195500 and 9804501, that added together give a palindrome (10000001).

The spelling of 1955009804501 in words is "one trillion, nine hundred fifty-five billion, nine million, eight hundred four thousand, five hundred one".