2101542645 has 8 divisors (see below), whose sum is σ = 3362468256. Its totient is φ = 1120822736.

The previous prime is 2101542643. The next prime is 2101542661. The reversal of 2101542645 is 5462451012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2101542645 - 2¹ = 2101542643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101542643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70051407 + ... + 70051436.

It is an arithmetic number, because the mean of its divisors is an integer number (420308532).

Almost surely, 2^2101542645 is an apocalyptic number.

It is an amenable number.

2101542645 is a deficient number, since it is larger than the sum of its proper divisors (1260925611).

2101542645 is a wasteful number, since it uses less digits than its factorization.

2101542645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140102851.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2101542645 is about 45842.5854964573. The cubic root of 2101542645 is about 1280.8926563397.

Adding to 2101542645 its reverse (5462451012), we get a palindrome (7563993657).

The spelling of 2101542645 in words is "two billion, one hundred one million, five hundred forty-two thousand, six hundred forty-five".