15858649379 has 2 divisors, whose sum is σ = 15858649380. Its totient is φ = 15858649378.

The previous prime is 15858649349. The next prime is 15858649423. The reversal of 15858649379 is 97394685851.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15858649379 - 2¹⁶ = 15858583843 is a prime.

It is not a weakly prime, because it can be changed into another prime (15858649349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7929324689 + 7929324690.

It is an arithmetic number, because the mean of its divisors is an integer number (7929324690).

Almost surely, 2^15858649379 is an apocalyptic number.

15858649379 is a deficient number, since it is larger than the sum of its proper divisors (1).

15858649379 is an equidigital number, since it uses as much as digits as its factorization.

15858649379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65318400, while the sum is 65.

The spelling of 15858649379 in words is "fifteen billion, eight hundred fifty-eight million, six hundred forty-nine thousand, three hundred seventy-nine".