1542394189929 has 4 divisors (see below), whose sum is σ = 2056525586576. Its totient is φ = 1028262793284.

The previous prime is 1542394189901. The next prime is 1542394189939. The reversal of 1542394189929 is 9299814932451.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1542394189929 - 2¹³ = 1542394181737 is a prime.

It is a super-2 number, since 2×1542394189929² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1542394189929.

It is not an unprimeable number, because it can be changed into a prime (1542394189939) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 257065698319 + ... + 257065698324.

It is an arithmetic number, because the mean of its divisors is an integer number (514131396644).

Almost surely, 2^{1542394189929} is an apocalyptic number.

It is an amenable number.

1542394189929 is a deficient number, since it is larger than the sum of its proper divisors (514131396647).

1542394189929 is an equidigital number, since it uses as much as digits as its factorization.

1542394189929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514131396646.

The product of its digits is 50388480, while the sum is 66.

The spelling of 1542394189929 in words is "one trillion, five hundred forty-two billion, three hundred ninety-four million, one hundred eighty-nine thousand, nine hundred twenty-nine".