26157655991 has 2 divisors, whose sum is σ = 26157655992. Its totient is φ = 26157655990.

The previous prime is 26157655963. The next prime is 26157656017. The reversal of 26157655991 is 19955675162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26157655991 - 2¹⁰ = 26157654967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26157655961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13078827995 + 13078827996.

It is an arithmetic number, because the mean of its divisors is an integer number (13078827996).

Almost surely, 2^26157655991 is an apocalyptic number.

26157655991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26157655991 is an equidigital number, since it uses as much as digits as its factorization.

26157655991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5103000, while the sum is 56.

The spelling of 26157655991 in words is "twenty-six billion, one hundred fifty-seven million, six hundred fifty-five thousand, nine hundred ninety-one".