11651439979 has 2 divisors, whose sum is σ = 11651439980. Its totient is φ = 11651439978.

The previous prime is 11651439973. The next prime is 11651440033. The reversal of 11651439979 is 97993415611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11651439979 - 2¹³ = 11651431787 is a prime.

It is not a weakly prime, because it can be changed into another prime (11651439973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5825719989 + 5825719990.

It is an arithmetic number, because the mean of its divisors is an integer number (5825719990).

Almost surely, 2^11651439979 is an apocalyptic number.

11651439979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11651439979 is an equidigital number, since it uses as much as digits as its factorization.

11651439979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 55.

The spelling of 11651439979 in words is "eleven billion, six hundred fifty-one million, four hundred thirty-nine thousand, nine hundred seventy-nine".