15415542042144 has 48 divisors (see below), whose sum is σ = 40466025230400. Its totient is φ = 5138485141760.

The previous prime is 15415542042143. The next prime is 15415542042227. The reversal of 15415542042144 is 44124024551451.

It is a tau number, because it is divible by the number of its divisors (48).

It is a junction number, because it is equal to n+sod(n) for n = 15415542042096 and 15415542042105.

It is not an unprimeable number, because it can be changed into a prime (15415542042143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23086282 + ... + 23744630.

It is an arithmetic number, because the mean of its divisors is an integer number (843042192300).

Almost surely, 2^{15415542042144} is an apocalyptic number.

It is an amenable number.

15415542042144 is an abundant number, since it is smaller than the sum of its proper divisors (25050483188256).

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

15415542042144 is a wasteful number, since it uses less digits than its factorization.

15415542042144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902273 (or 902265 counting only the distinct ones).

The product of its (nonzero) digits is 512000, while the sum is 42.

Adding to 15415542042144 its reverse (44124024551451), we get a palindrome (59539566593595).

The spelling of 15415542042144 in words is "fifteen trillion, four hundred fifteen billion, five hundred forty-two million, forty-two thousand, one hundred forty-four".