16689137501 has 2 divisors, whose sum is σ = 16689137502. Its totient is φ = 16689137500.

The previous prime is 16689137489. The next prime is 16689137513. The reversal of 16689137501 is 10573198661.

It is a balanced prime because it is at equal distance from previous prime (16689137489) and next prime (16689137513).

It can be written as a sum of positive squares in only one way, i.e., 12133022500 + 4556115001 = 110150^2 + 67499^2 .

It is a cyclic number.

It is not a de Polignac number, because 16689137501 - 2¹⁴ = 16689121117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16689137581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8344568750 + 8344568751.

It is an arithmetic number, because the mean of its divisors is an integer number (8344568751).

Almost surely, 2^16689137501 is an apocalyptic number.

It is an amenable number.

16689137501 is a deficient number, since it is larger than the sum of its proper divisors (1).

16689137501 is an equidigital number, since it uses as much as digits as its factorization.

16689137501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 16689137501 in words is "sixteen billion, six hundred eighty-nine million, one hundred thirty-seven thousand, five hundred one".