11651457091 has 2 divisors, whose sum is σ = 11651457092. Its totient is φ = 11651457090.

The previous prime is 11651457029. The next prime is 11651457133. The reversal of 11651457091 is 19075415611.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11651457091 - 2¹¹ = 11651455043 is a prime.

It is not a weakly prime, because it can be changed into another prime (11651457011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825728545 + 5825728546.

It is an arithmetic number, because the mean of its divisors is an integer number (5825728546).

Almost surely, 2^11651457091 is an apocalyptic number.

11651457091 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651457091 is an equidigital number, since it uses as much as digits as its factorization.

11651457091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 40.

The spelling of 11651457091 in words is "eleven billion, six hundred fifty-one million, four hundred fifty-seven thousand, ninety-one".