55515874317623 has 4 divisors (see below), whose sum is σ = 56344469456760. Its totient is φ = 54687279178488.

The previous prime is 55515874317581. The next prime is 55515874317649. The reversal of 55515874317623 is 32671347851555.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55515874317623 - 2⁸ = 55515874317367 is a prime.

It is a super-2 number, since 2×55515874317623² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55515874317653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414297569468 + ... + 414297569601.

It is an arithmetic number, because the mean of its divisors is an integer number (14086117364190).

Almost surely, 2^{55515874317623} is an apocalyptic number.

55515874317623 is a deficient number, since it is larger than the sum of its proper divisors (828595139137).

55515874317623 is an equidigital number, since it uses as much as digits as its factorization.

55515874317623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828595139136.

The product of its digits is 105840000, while the sum is 62.

The spelling of 55515874317623 in words is "fifty-five trillion, five hundred fifteen billion, eight hundred seventy-four million, three hundred seventeen thousand, six hundred twenty-three".