26621016543 has 48 divisors (see below), whose sum is σ = 42779936160. Its totient is φ = 15814656000.

The previous prime is 26621016511. The next prime is 26621016559. The reversal of 26621016543 is 34561012662.

26621016543 is a `hidden beast` number, since 2 + 6 + 6 + 2 + 101 + 6 + 543 = 666.

It is not a de Polignac number, because 26621016543 - 2⁵ = 26621016511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26621016498 and 26621016507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26621016503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8398863 + ... + 8402031.

It is an arithmetic number, because the mean of its divisors is an integer number (891248670).

Almost surely, 2^26621016543 is an apocalyptic number.

26621016543 is a deficient number, since it is larger than the sum of its proper divisors (16158919617).

26621016543 is a wasteful number, since it uses less digits than its factorization.

26621016543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4840 (or 4837 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 26621016543 in words is "twenty-six billion, six hundred twenty-one million, sixteen thousand, five hundred forty-three".