100661534503 has 4 divisors (see below), whose sum is σ = 100847600728. Its totient is φ = 100475468280.

The previous prime is 100661534497. The next prime is 100661534537. The reversal of 100661534503 is 305435166001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100661534503 - 2²⁹ = 100124663591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100661534573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93032301 + ... + 93033382.

It is an arithmetic number, because the mean of its divisors is an integer number (25211900182).

Almost surely, 2^100661534503 is an apocalyptic number.

100661534503 is a deficient number, since it is larger than the sum of its proper divisors (186066225).

100661534503 is an equidigital number, since it uses as much as digits as its factorization.

100661534503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186066224.

The product of its (nonzero) digits is 32400, while the sum is 34.

The spelling of 100661534503 in words is "one hundred billion, six hundred sixty-one million, five hundred thirty-four thousand, five hundred three".