26153401991 has 2 divisors, whose sum is σ = 26153401992. Its totient is φ = 26153401990.

The previous prime is 26153401949. The next prime is 26153402053. The reversal of 26153401991 is 19910435162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26153401991 - 2⁶ = 26153401927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26153401931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13076700995 + 13076700996.

It is an arithmetic number, because the mean of its divisors is an integer number (13076700996).

Almost surely, 2^26153401991 is an apocalyptic number.

26153401991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26153401991 is an equidigital number, since it uses as much as digits as its factorization.

26153401991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The spelling of 26153401991 in words is "twenty-six billion, one hundred fifty-three million, four hundred one thousand, nine hundred ninety-one".