26891558145 has 40 divisors (see below), whose sum is σ = 48245662080. Its totient is φ = 14330247840.

The previous prime is 26891558131. The next prime is 26891558149. The reversal of 26891558145 is 54185519862.

26891558145 is a `hidden beast` number, since 2 + 6 + 8 + 9 + 15 + 581 + 45 = 666.

It is not a de Polignac number, because 26891558145 - 2⁶ = 26891558081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26891558091 and 26891558100.

It is not an unprimeable number, because it can be changed into a prime (26891558149) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 471586 + ... + 525524.

It is an arithmetic number, because the mean of its divisors is an integer number (1206141552).

Almost surely, 2^26891558145 is an apocalyptic number.

It is an amenable number.

26891558145 is a deficient number, since it is larger than the sum of its proper divisors (21354103935).

26891558145 is a wasteful number, since it uses less digits than its factorization.

26891558145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55187 (or 55178 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 54.

The spelling of 26891558145 in words is "twenty-six billion, eight hundred ninety-one million, five hundred fifty-eight thousand, one hundred forty-five".