26994742477 has 2 divisors, whose sum is σ = 26994742478. Its totient is φ = 26994742476.

The previous prime is 26994742417. The next prime is 26994742483. The reversal of 26994742477 is 77424749962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22254970761 + 4739771716 = 149181^2 + 68846^2 .

It is a cyclic number.

It is not a de Polignac number, because 26994742477 - 2¹⁹ = 26994218189 is a prime.

It is a super-2 number, since 2×26994742477² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26994742417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13497371238 + 13497371239.

It is an arithmetic number, because the mean of its divisors is an integer number (13497371239).

Almost surely, 2^26994742477 is an apocalyptic number.

It is an amenable number.

26994742477 is a deficient number, since it is larger than the sum of its proper divisors (1).

26994742477 is an equidigital number, since it uses as much as digits as its factorization.

26994742477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42674688, while the sum is 61.

The spelling of 26994742477 in words is "twenty-six billion, nine hundred ninety-four million, seven hundred forty-two thousand, four hundred seventy-seven".