155203520012 has 6 divisors (see below), whose sum is σ = 271606160028. Its totient is φ = 77601760004.

The previous prime is 155203519951. The next prime is 155203520027. The reversal of 155203520012 is 210025302551.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19400439998 + ... + 19400440005.

It is an arithmetic number, because the mean of its divisors is an integer number (45267693338).

Almost surely, 2^155203520012 is an apocalyptic number.

It is an amenable number.

155203520012 is a deficient number, since it is larger than the sum of its proper divisors (116402640016).

155203520012 is a wasteful number, since it uses less digits than its factorization.

155203520012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38800880007 (or 38800880005 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 155203520012 its reverse (210025302551), we get a palindrome (365228822563).

The spelling of 155203520012 in words is "one hundred fifty-five billion, two hundred three million, five hundred twenty thousand, twelve".