155581052642 has 8 divisors (see below), whose sum is σ = 247099318956. Its totient is φ = 73214612992.

The previous prime is 155581052633. The next prime is 155581052689. The reversal of 155581052642 is 246250185551.

It is a happy number.

155581052642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 155550571201 + 30481441 = 394399^2 + 5521^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 155581052593 and 155581052602.

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 in 3 ways as a sum of consecutive naturals, for example, 2287956623 + ... + 2287956690.

Almost surely, 2^155581052642 is an apocalyptic number.

155581052642 is a deficient number, since it is larger than the sum of its proper divisors (91518266314).

155581052642 is a wasteful number, since it uses less digits than its factorization.

155581052642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4575913332.

The product of its (nonzero) digits is 480000, while the sum is 44.

The spelling of 155581052642 in words is "one hundred fifty-five billion, five hundred eighty-one million, fifty-two thousand, six hundred forty-two".