155705235442 has 8 divisors (see below), whose sum is σ = 233568730332. Its totient is φ = 77848992000.

The previous prime is 155705235437. The next prime is 155705235509. The reversal of 155705235442 is 244532507551.

It can be written as a sum of positive squares in 2 ways, for example, as 155227332121 + 477903321 = 393989^2 + 21861^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758859 + ... + 1845262.

Almost surely, 2^155705235442 is an apocalyptic number.

155705235442 is a deficient number, since it is larger than the sum of its proper divisors (77863494890).

155705235442 is a wasteful number, since it uses less digits than its factorization.

155705235442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3625724.

The product of its (nonzero) digits is 840000, while the sum is 43.

The spelling of 155705235442 in words is "one hundred fifty-five billion, seven hundred five million, two hundred thirty-five thousand, four hundred forty-two".