16264999991 has 2 divisors, whose sum is σ = 16264999992. Its totient is φ = 16264999990.

The previous prime is 16264999979. The next prime is 16265000021. The reversal of 16264999991 is 19999946261.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16264999991 - 2³⁰ = 15191258167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16264999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8132499995 + 8132499996.

It is an arithmetic number, because the mean of its divisors is an integer number (8132499996).

Almost surely, 2^16264999991 is an apocalyptic number.

16264999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

16264999991 is an equidigital number, since it uses as much as digits as its factorization.

16264999991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17006112, while the sum is 65.

The spelling of 16264999991 in words is "sixteen billion, two hundred sixty-four million, nine hundred ninety-nine thousand, nine hundred ninety-one".