16535957957 has 2 divisors, whose sum is σ = 16535957958. Its totient is φ = 16535957956.

The previous prime is 16535957929. The next prime is 16535957983. The reversal of 16535957957 is 75975953561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9364239361 + 7171718596 = 96769^2 + 84686^2 .

It is a cyclic number.

It is not a de Polignac number, because 16535957957 - 2¹⁶ = 16535892421 is a prime.

It is a super-2 number, since 2×16535957957² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16535957957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16535957357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8267978978 + 8267978979.

It is an arithmetic number, because the mean of its divisors is an integer number (8267978979).

Almost surely, 2^16535957957 is an apocalyptic number.

It is an amenable number.

16535957957 is a deficient number, since it is larger than the sum of its proper divisors (1).

16535957957 is an equidigital number, since it uses as much as digits as its factorization.

16535957957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44651250, while the sum is 62.

The spelling of 16535957957 in words is "sixteen billion, five hundred thirty-five million, nine hundred fifty-seven thousand, nine hundred fifty-seven".