100661155005552 has 80 divisors (see below), whose sum is σ = 274792791183360. Its totient is φ = 31664045408256.

The previous prime is 100661155005451. The next prime is 100661155005643. The reversal of 100661155005552 is 255500551166001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214501168 + ... + 214969935.

It is an arithmetic number, because the mean of its divisors is an integer number (3434909889792).

Almost surely, 2^{100661155005552} is an apocalyptic number.

100661155005552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100661155005552 is an abundant number, since it is smaller than the sum of its proper divisors (174131636177808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100661155005552 is a wasteful number, since it uses less digits than its factorization.

100661155005552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429471390 (or 429471384 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 42.

The spelling of 100661155005552 in words is "one hundred trillion, six hundred sixty-one billion, one hundred fifty-five million, five thousand, five hundred fifty-two".