15554353231055 has 4 divisors (see below), whose sum is σ = 18665223877272. Its totient is φ = 12443482584840.

The previous prime is 15554353231033. The next prime is 15554353231061. The reversal of 15554353231055 is 55013235345551.

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

It is not a de Polignac number, because 15554353231055 - 2⁸ = 15554353230799 is a prime.

It is a super-2 number, since 2×15554353231055² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1555435323101 + ... + 1555435323110.

It is an arithmetic number, because the mean of its divisors is an integer number (4666305969318).

Almost surely, 2^{15554353231055} is an apocalyptic number.

15554353231055 is a deficient number, since it is larger than the sum of its proper divisors (3110870646217).

15554353231055 is an equidigital number, since it uses as much as digits as its factorization.

15554353231055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3110870646216.

The product of its (nonzero) digits is 3375000, while the sum is 47.

The spelling of 15554353231055 in words is "fifteen trillion, five hundred fifty-four billion, three hundred fifty-three million, two hundred thirty-one thousand, fifty-five".