16637475461 has 2 divisors, whose sum is σ = 16637475462. Its totient is φ = 16637475460.

The previous prime is 16637475427. The next prime is 16637475473. The reversal of 16637475461 is 16457473661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11242572961 + 5394902500 = 106031^2 + 73450^2 .

It is a cyclic number.

It is not a de Polignac number, because 16637475461 - 2⁶ = 16637475397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16637475061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8318737730 + 8318737731.

It is an arithmetic number, because the mean of its divisors is an integer number (8318737731).

Almost surely, 2^16637475461 is an apocalyptic number.

It is an amenable number.

16637475461 is a deficient number, since it is larger than the sum of its proper divisors (1).

16637475461 is an equidigital number, since it uses as much as digits as its factorization.

16637475461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 50.

The spelling of 16637475461 in words is "sixteen billion, six hundred thirty-seven million, four hundred seventy-five thousand, four hundred sixty-one".