1955223640423 has 16 divisors (see below), whose sum is σ = 2080510678080. Its totient is φ = 1831096060416.

The previous prime is 1955223640421. The next prime is 1955223640499. The reversal of 1955223640423 is 3240463225591.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1955223640423 - 2¹ = 1955223640421 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 (1955223640421) 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, 3219373 + ... + 3778201.

It is an arithmetic number, because the mean of its divisors is an integer number (130031917380).

Almost surely, 2^{1955223640423} is an apocalyptic number.

1955223640423 is a deficient number, since it is larger than the sum of its proper divisors (125287037657).

1955223640423 is a wasteful number, since it uses less digits than its factorization.

1955223640423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559866.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 1955223640423 in words is "one trillion, nine hundred fifty-five billion, two hundred twenty-three million, six hundred forty thousand, four hundred twenty-three".