1542431656415 has 24 divisors (see below), whose sum is σ = 2004347086560. Its totient is φ = 1138970411904.

The previous prime is 1542431656411. The next prime is 1542431656427. The reversal of 1542431656415 is 5146561342451.

It is not a de Polignac number, because 1542431656415 - 2² = 1542431656411 is a prime.

It is a super-2 number, since 2×1542431656415² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1542431656415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1542431656411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26232389 + ... + 26291121.

It is an arithmetic number, because the mean of its divisors is an integer number (83514461940).

Almost surely, 2^{1542431656415} is an apocalyptic number.

1542431656415 is a deficient number, since it is larger than the sum of its proper divisors (461915430145).

1542431656415 is a wasteful number, since it uses less digits than its factorization.

1542431656415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89843 (or 89830 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 47.

Adding to 1542431656415 its reverse (5146561342451), we get a palindrome (6688992998866).

The spelling of 1542431656415 in words is "one trillion, five hundred forty-two billion, four hundred thirty-one million, six hundred fifty-six thousand, four hundred fifteen".