2101776745 has 8 divisors (see below), whose sum is σ = 2569719816. Its totient is φ = 1649696256.

The previous prime is 2101776739. The next prime is 2101776757. The reversal of 2101776745 is 5476771012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 971942976 + 1129833769 = 31176^2 + 33613^2 .

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 2101776745 - 2⁷ = 2101776617 is a prime.

It is a super-3 number, since 3×2101776745³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101776698 and 2101776707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3965352 + ... + 3965881.

It is an arithmetic number, because the mean of its divisors is an integer number (321214977).

Almost surely, 2^2101776745 is an apocalyptic number.

It is an amenable number.

2101776745 is a deficient number, since it is larger than the sum of its proper divisors (467943071).

2101776745 is an equidigital number, since it uses as much as digits as its factorization.

2101776745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7931291.

The product of its (nonzero) digits is 82320, while the sum is 40.

The square root of 2101776745 is about 45845.1387281138. The cubic root of 2101776745 is about 1280.9402159801.

The spelling of 2101776745 in words is "two billion, one hundred one million, seven hundred seventy-six thousand, seven hundred forty-five".