26987433377431 has 2 divisors, whose sum is σ = 26987433377432. Its totient is φ = 26987433377430.

The previous prime is 26987433377383. The next prime is 26987433377449. The reversal of 26987433377431 is 13477333478962.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26987433377431 - 2²¹ = 26987431280279 is a prime.

It is a super-2 number, since 2×26987433377431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26987433377461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13493716688715 + 13493716688716.

It is an arithmetic number, because the mean of its divisors is an integer number (13493716688716).

Almost surely, 2^{26987433377431} is an apocalyptic number.

26987433377431 is a deficient number, since it is larger than the sum of its proper divisors (1).

26987433377431 is an equidigital number, since it uses as much as digits as its factorization.

26987433377431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384072192, while the sum is 67.

The spelling of 26987433377431 in words is "twenty-six trillion, nine hundred eighty-seven billion, four hundred thirty-three million, three hundred seventy-seven thousand, four hundred thirty-one".