16025978477 has 2 divisors, whose sum is σ = 16025978478. Its totient is φ = 16025978476.

The previous prime is 16025978467. The next prime is 16025978513. The reversal of 16025978477 is 77487952061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10407876361 + 5618102116 = 102019^2 + 74954^2 .

It is a cyclic number.

It is not a de Polignac number, because 16025978477 - 2¹⁰ = 16025977453 is a prime.

It is a super-2 number, since 2×16025978477² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16025978467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8012989238 + 8012989239.

It is an arithmetic number, because the mean of its divisors is an integer number (8012989239).

Almost surely, 2^16025978477 is an apocalyptic number.

It is an amenable number.

16025978477 is a deficient number, since it is larger than the sum of its proper divisors (1).

16025978477 is an equidigital number, since it uses as much as digits as its factorization.

16025978477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 16025978477 in words is "sixteen billion, twenty-five million, nine hundred seventy-eight thousand, four hundred seventy-seven".