16120615549 has 2 divisors, whose sum is σ = 16120615550. Its totient is φ = 16120615548.

The previous prime is 16120615541. The next prime is 16120615559. The reversal of 16120615549 is 94551602161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15496515225 + 624100324 = 124485^2 + 24982^2 .

It is a cyclic number.

It is not a de Polignac number, because 16120615549 - 2³ = 16120615541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16120615541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8060307774 + 8060307775.

It is an arithmetic number, because the mean of its divisors is an integer number (8060307775).

Almost surely, 2^16120615549 is an apocalyptic number.

It is an amenable number.

16120615549 is a deficient number, since it is larger than the sum of its proper divisors (1).

16120615549 is an equidigital number, since it uses as much as digits as its factorization.

16120615549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 16120615549 in words is "sixteen billion, one hundred twenty million, six hundred fifteen thousand, five hundred forty-nine".