16542787769077 has 2 divisors, whose sum is σ = 16542787769078. Its totient is φ = 16542787769076.

The previous prime is 16542787769041. The next prime is 16542787769087. The reversal of 16542787769077 is 77096778724561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8434383448401 + 8108404320676 = 2904201^2 + 2847526^2 .

It is a cyclic number.

It is not a de Polignac number, because 16542787769077 - 2¹⁵ = 16542787736309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16542787768994 and 16542787769012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16542787769087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8271393884538 + 8271393884539.

It is an arithmetic number, because the mean of its divisors is an integer number (8271393884539).

Almost surely, 2^{16542787769077} is an apocalyptic number.

It is an amenable number.

16542787769077 is a deficient number, since it is larger than the sum of its proper divisors (1).

16542787769077 is an equidigital number, since it uses as much as digits as its factorization.

16542787769077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1742549760, while the sum is 76.

The spelling of 16542787769077 in words is "sixteen trillion, five hundred forty-two billion, seven hundred eighty-seven million, seven hundred sixty-nine thousand, seventy-seven".