1023402420555 has 16 divisors (see below), whose sum is σ = 1637570929920. Its totient is φ = 545772271968.

The previous prime is 1023402420541. The next prime is 1023402420559. The reversal of 1023402420555 is 5550242043201.

It is a happy number.

It is not a de Polignac number, because 1023402420555 - 2⁹ = 1023402420043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1023402420559) 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, 2446777 + ... + 2834346.

It is an arithmetic number, because the mean of its divisors is an integer number (102348183120).

Almost surely, 2^{1023402420555} is an apocalyptic number.

1023402420555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1023402420555 is a deficient number, since it is larger than the sum of its proper divisors (614168509365).

1023402420555 is a wasteful number, since it uses less digits than its factorization.

1023402420555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5294050.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 1023402420555 its reverse (5550242043201), we get a palindrome (6573644463756).

The spelling of 1023402420555 in words is "one trillion, twenty-three billion, four hundred two million, four hundred twenty thousand, five hundred fifty-five".