15551323145 has 16 divisors (see below), whose sum is σ = 18858503808. Its totient is φ = 12310425600.

The previous prime is 15551323133. The next prime is 15551323159. The reversal of 15551323145 is 54132315551.

It is not a de Polignac number, because 15551323145 - 2¹⁴ = 15551306761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153962 + ... + 234108.

It is an arithmetic number, because the mean of its divisors is an integer number (1178656488).

Almost surely, 2^15551323145 is an apocalyptic number.

It is an amenable number.

15551323145 is a deficient number, since it is larger than the sum of its proper divisors (3307180663).

15551323145 is a wasteful number, since it uses less digits than its factorization.

15551323145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80560.

The product of its digits is 45000, while the sum is 35.

Adding to 15551323145 its reverse (54132315551), we get a palindrome (69683638696).

The spelling of 15551323145 in words is "fifteen billion, five hundred fifty-one million, three hundred twenty-three thousand, one hundred forty-five".