100661250543 has 64 divisors (see below), whose sum is σ = 159738624000. Its totient is φ = 55186458624.

The previous prime is 100661250539. The next prime is 100661250563. The reversal of 100661250543 is 345052166001.

It is not a de Polignac number, because 100661250543 - 2² = 100661250539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100661250563) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28281798 + ... + 28285356.

It is an arithmetic number, because the mean of its divisors is an integer number (2495916000).

Almost surely, 2^100661250543 is an apocalyptic number.

100661250543 is a deficient number, since it is larger than the sum of its proper divisors (59077373457).

100661250543 is a wasteful number, since it uses less digits than its factorization.

100661250543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 100661250543 in words is "one hundred billion, six hundred sixty-one million, two hundred fifty thousand, five hundred forty-three".