26798551857 has 48 divisors (see below), whose sum is σ = 48319165440. Its totient is φ = 13904431200.

The previous prime is 26798551849. The next prime is 26798551933. The reversal of 26798551857 is 75815589762.

26798551857 is a `hidden beast` number, since 2 + 6 + 79 + 8 + 551 + 8 + 5 + 7 = 666.

It is not a de Polignac number, because 26798551857 - 2³ = 26798551849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 26798551794 and 26798551803.

It is not an unprimeable number, because it can be changed into a prime (26798541857) 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, 558382 + ... + 604472.

It is an arithmetic number, because the mean of its divisors is an integer number (1006649280).

Almost surely, 2^26798551857 is an apocalyptic number.

It is an amenable number.

26798551857 is a deficient number, since it is larger than the sum of its proper divisors (21520613583).

26798551857 is a wasteful number, since it uses less digits than its factorization.

26798551857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46954 (or 46951 counting only the distinct ones).

The product of its digits is 42336000, while the sum is 63.

The spelling of 26798551857 in words is "twenty-six billion, seven hundred ninety-eight million, five hundred fifty-one thousand, eight hundred fifty-seven".