155042332442 has 4 divisors (see below), whose sum is σ = 232563498666. Its totient is φ = 77521166220.

The previous prime is 155042332411. The next prime is 155042332463. The reversal of 155042332442 is 244233240551.

It is a happy number.

155042332442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244233240551 = 432661 ⋅564491.

It can be written as a sum of positive squares in only one way, i.e., 132175146481 + 22867185961 = 363559^2 + 151219^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38760583109 + ... + 38760583112.

Almost surely, 2^155042332442 is an apocalyptic number.

155042332442 is a deficient number, since it is larger than the sum of its proper divisors (77521166224).

155042332442 is an equidigital number, since it uses as much as digits as its factorization.

155042332442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77521166223.

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 155042332442 its reverse (244233240551), we get a palindrome (399275572993).

The spelling of 155042332442 in words is "one hundred fifty-five billion, forty-two million, three hundred thirty-two thousand, four hundred forty-two".