15345551444442 has 16 divisors (see below), whose sum is σ = 31194235723872. Its totient is φ = 5031328342320.

The previous prime is 15345551444413. The next prime is 15345551444467. The reversal of 15345551444442 is 24444415554351.

It is a super-2 number, since 2×15345551444442² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20963867728 + ... + 20963868459.

It is an arithmetic number, because the mean of its divisors is an integer number (1949639732742).

Almost surely, 2^{15345551444442} is an apocalyptic number.

15345551444442 is an abundant number, since it is smaller than the sum of its proper divisors (15848684279430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15345551444442 is a wasteful number, since it uses less digits than its factorization.

15345551444442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41927736253.

The product of its digits is 15360000, while the sum is 51.

Adding to 15345551444442 its reverse (24444415554351), we get a palindrome (39789966998793).

The spelling of 15345551444442 in words is "fifteen trillion, three hundred forty-five billion, five hundred fifty-one million, four hundred forty-four thousand, four hundred forty-two".