20155145655075 has 24 divisors (see below), whose sum is σ = 33653106579696. Its totient is φ = 10642981200000.

The previous prime is 20155145655067. The next prime is 20155145655091. The reversal of 20155145655075 is 57055654155102.

It is not a de Polignac number, because 20155145655075 - 2³ = 20155145655067 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 1330365076 + ... + 1330380225.

It is an arithmetic number, because the mean of its divisors is an integer number (1402212774154).

Almost surely, 2^{20155145655075} is an apocalyptic number.

20155145655075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20155145655075 is a deficient number, since it is larger than the sum of its proper divisors (13497960924621).

20155145655075 is a wasteful number, since it uses less digits than its factorization.

20155145655075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660745415 (or 2660745410 counting only the distinct ones).

The product of its (nonzero) digits is 5250000, while the sum is 51.

The spelling of 20155145655075 in words is "twenty trillion, one hundred fifty-five billion, one hundred forty-five million, six hundred fifty-five thousand, seventy-five".