16148748521 has 2 divisors, whose sum is σ = 16148748522. Its totient is φ = 16148748520.

The previous prime is 16148748479. The next prime is 16148748593. The reversal of 16148748521 is 12584784161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15162474496 + 986274025 = 123136^2 + 31405^2 .

It is an emirp because it is prime and its reverse (12584784161) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16148748521 is a prime.

It is not a weakly prime, because it can be changed into another prime (16148748221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8074374260 + 8074374261.

It is an arithmetic number, because the mean of its divisors is an integer number (8074374261).

Almost surely, 2^16148748521 is an apocalyptic number.

It is an amenable number.

16148748521 is a deficient number, since it is larger than the sum of its proper divisors (1).

16148748521 is an equidigital number, since it uses as much as digits as its factorization.

16148748521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 430080, while the sum is 47.

The spelling of 16148748521 in words is "sixteen billion, one hundred forty-eight million, seven hundred forty-eight thousand, five hundred twenty-one".