155660561242 has 8 divisors (see below), whose sum is σ = 245779833600. Its totient is φ = 73733950044.

The previous prime is 155660561239. The next prime is 155660561311. The reversal of 155660561242 is 242165066551.

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, 2048165242 + ... + 2048165317.

It is an arithmetic number, because the mean of its divisors is an integer number (30722479200).

Almost surely, 2^155660561242 is an apocalyptic number.

155660561242 is a deficient number, since it is larger than the sum of its proper divisors (90119272358).

155660561242 is a wasteful number, since it uses less digits than its factorization.

155660561242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096330580.

The product of its (nonzero) digits is 432000, while the sum is 43.

The spelling of 155660561242 in words is "one hundred fifty-five billion, six hundred sixty million, five hundred sixty-one thousand, two hundred forty-two".