16199800637 has 2 divisors, whose sum is σ = 16199800638. Its totient is φ = 16199800636.

The previous prime is 16199800579. The next prime is 16199800651. The reversal of 16199800637 is 73600899161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8958811801 + 7240988836 = 94651^2 + 85094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16199800637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16199800937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8099900318 + 8099900319.

It is an arithmetic number, because the mean of its divisors is an integer number (8099900319).

Almost surely, 2^16199800637 is an apocalyptic number.

It is an amenable number.

16199800637 is a deficient number, since it is larger than the sum of its proper divisors (1).

16199800637 is an equidigital number, since it uses as much as digits as its factorization.

16199800637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 50.

The spelling of 16199800637 in words is "sixteen billion, one hundred ninety-nine million, eight hundred thousand, six hundred thirty-seven".