26720542745 has 32 divisors (see below), whose sum is σ = 36964771200. Its totient is φ = 18376671744.

The previous prime is 26720542657. The next prime is 26720542769. The reversal of 26720542745 is 54724502762.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26720542745 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 26720542696 and 26720542705.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110492 + ... + 256221.

It is an arithmetic number, because the mean of its divisors is an integer number (1155149100).

Almost surely, 2^26720542745 is an apocalyptic number.

It is an amenable number.

26720542745 is a deficient number, since it is larger than the sum of its proper divisors (10244228455).

26720542745 is a wasteful number, since it uses less digits than its factorization.

26720542745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366809.

The product of its (nonzero) digits is 940800, while the sum is 44.

The spelling of 26720542745 in words is "twenty-six billion, seven hundred twenty million, five hundred forty-two thousand, seven hundred forty-five".