16078257557 has 2 divisors, whose sum is σ = 16078257558. Its totient is φ = 16078257556.

The previous prime is 16078257529. The next prime is 16078257583. The reversal of 16078257557 is 75575287061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15136626961 + 941630596 = 123031^2 + 30686^2 .

It is a cyclic number.

It is not a de Polignac number, because 16078257557 - 2⁶ = 16078257493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16078257499 and 16078257508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16078257257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8039128778 + 8039128779.

It is an arithmetic number, because the mean of its divisors is an integer number (8039128779).

Almost surely, 2^16078257557 is an apocalyptic number.

It is an amenable number.

16078257557 is a deficient number, since it is larger than the sum of its proper divisors (1).

16078257557 is an equidigital number, since it uses as much as digits as its factorization.

16078257557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4116000, while the sum is 53.

The spelling of 16078257557 in words is "sixteen billion, seventy-eight million, two hundred fifty-seven thousand, five hundred fifty-seven".