1554550331145 has 16 divisors (see below), whose sum is σ = 2842606320000. Its totient is φ = 710651579904.

The previous prime is 1554550331141. The next prime is 1554550331153. The reversal of 1554550331145 is 5411330554551.

It is not a de Polignac number, because 1554550331145 - 2² = 1554550331141 is a prime.

It is a super-2 number, since 2×1554550331145² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1554550331097 and 1554550331106.

It is not an unprimeable number, because it can be changed into a prime (1554550331141) 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, 7402620520 + ... + 7402620729.

It is an arithmetic number, because the mean of its divisors is an integer number (177662895000).

Almost surely, 2^{1554550331145} is an apocalyptic number.

1554550331145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1554550331145 is a deficient number, since it is larger than the sum of its proper divisors (1288055988855).

1554550331145 is a wasteful number, since it uses less digits than its factorization.

1554550331145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805241264.

The product of its (nonzero) digits is 450000, while the sum is 42.

Adding to 1554550331145 its reverse (5411330554551), we get a palindrome (6965880885696).

The spelling of 1554550331145 in words is "one trillion, five hundred fifty-four billion, five hundred fifty million, three hundred thirty-one thousand, one hundred forty-five".